Maybe it is Simplicity Lavender. Check on helpme find.

http://www.jacksonandperkins.com/fragrant-lavender-simplicityreg-hedge-rose/p/v1570/

I grow Fragrant Lavender Simplicity--you don't get cupped blooms typical of most Austin roses--they are more like little Hybrid Tea roses.
http://www.davidaustinroses.co.uk/type/english-roses/

I went to the David Austin site for the UK for the complete line of their roses--they have to clear some import hurdles before selling them in the USA. According to their search page, there is no color option for similar to lavender.

Photo editing programs will easy change the color of blooms so it is very easy to be misled by what you see on the Internet.

Thank you for that suggestion!

It's definitely not lavender simplicity. I own that rose and the bloom shape is different with far less petals. Picture of it below.

If you look in the bottom right corner of that first picture in my first post you can see something that looks like it says Kordes 2013? Maybe?

That's why I was leaning towards Poseidon. I'm hoping it's not Poseidon because that rose never really achieves such a full old rose look in my area.

And what looks like the logo for whoever was selling it.

Edit -

I'm aware that David Austin doesn't have a lavender rose. I was thinking Kordes because I can kinda make out their brand in the corner I think. Maybe?

David Austin is just the style of bloom my boyfriend was referring to when he said "those renaissance painting roses". Not the actual breeder.

It might be this one. Florist roses often need to be grown under greenhouse conditions.
Meilland Florist rose

Is this it?
Kordes Blue PomPom 2015

Here's a bigger image

https://mattari-momo.tumblr.com/post/125962168949/rose-kinda-blue-at-international-roses

What I see in the bottom right corner is the rose name--"Kinda Blue" (after Miles Davis' famous album?) -- and beneath it Kordes. However, I can find no such rose listed in helpmefind.com.

I seem to remember someone once saying that the names of Kordes roses are changed when they are exported to the USA and the rest of the world.

Could it be this rose--Novalis--from the Kordes fairytale series?

If you can't identify this rose for sure, you might consider planting the following lavender floribunda called "Love Song." It is a Weeks rose and readily available.

This is a good rose--big blooms, good rebloom, nice lavender color, good BS resistance.

Kate

https://www.helpmefind.com/rose/l.php?l=2.63414.0

Helpmefind says Novalis is the same as Poseiden.

Thank you everyone!

I think sandplum and Arisyn are on the right track!.

Dublinbay - Novalis is Poseidon. And I do have him and Love Song. Amazing roses that are great suggestions.

They just don't have that... Cup and saucer look I really like on the photo above.

I'm a bit of a lavender freak, and would love getting a big English style rose bush in that colour!

It does say Kinda Blue-Kordes 2015 and likely Poseidon. Thinking thou Blue PomPom is correct.

If you give Love Song time to get established a mature specimen will look like the above picture with the coveted cup and saucer look.

Here's a very cupped lavender with small flowers I photographed at a local nursery -- Kordes Blue Pompom Freelander:

Did your boyfriend say if it was a shrub or climbing rose? The blooms look similar to those of the new climber 'Quicksilver'.

I think it's Quick Silver as well.

Wow! Thank you everyone.

Nanadoll, that love song is gorgeous. I can't wait for mine to mature.

My boyfriend never said if it was a climber. He didn't take that photo. I believe it popped up in his Pinterest feed but was a dead end as far as identifying it

Even if it's not the same rose you guys gave me two amazing options that really checked all my boxes!

Now to find out where the heck to buy them.

ordphien, thank you so much. I wasn't talking about the photo you posted, but the first photo romogen posted, that came from a thread I started a little while ago on the Antique Rose Forum. I called that thread Deep Purple Spring. Love Song isn't a climber (as you must know), but it's a wonderful rose. Diane

Love song is beautiful Diane. Then again, all of your roses are beautiful

Thank you; I appreciate that. Diane

My vote is for Love Song. It's been a really great rose for me.

I also recently found a photo of a very similar looking rose on Instagram! It was on a Japanese page and the only English hashtag I could find was "Kinda Blue" I tried to look into it but couldn't find any information.... I have Love Song & the flower shape seems completely different to me. This flower shape is so beautiful!

Here's more information about this rose: Kinda Blue

It's a HT so that rules out Quicksilver and Poseidon.

It's possible that maybe this rose was only released in Japan, like how Quicksilver is for the US...

I may guessing wrong on this, but Kinda Blue may be a rose we've debated about on the Forum several times. It's not particularly blue, judging from the photos, and it's very expensive. Supposedly, "scientists" tweaked the rose's genes to achieve a blue color. We all concluded that it was a whole lot of nothing. Someone on here who remembers those threads on the Japanese blue rose, please tell me if I'm incorrect on this thing. I posted my photos of Kordes' Blue Bayou which is the bluest rose I've ever seen--I don't know how many times I've posted that photo. Too many times, I think. But the blue rose debate keeps coming up on the Forum. I think I'll do a few searches for those threads. Diane

Blue Bayou--the photo has not been altered in any way.

Well, I found one of the threads on the blue rose debate, and the Suntory (Japanese) blue rose that has genetically alter genes was called Applause in 2015. I still don't know if that's the rose you're looking for. Diane

I know this is an old thread but that rose looks similar to one I saw online called "Rainy Blues". It's only sold in Japan. I wish I had it, I'm a big Lavender rose lover.

It is kinda blue

Kinda blue = Blue Pom pom

https://www.helpmefind.com/gardening/l.php?l=2.77826.1

Well done rose detectives ! That is a truly beautiful rose.

Now to locate it.

Yes, it's a beautiful rose, but I'm skeptical. This rose was introduced in the US under two names back in 2015, and at this point, there are only three growers on HMF with photos, and two favorite votes. If the rose is so great, why isn't Kordes flogging it all over the place and why are not more people at various world locations growing it? Sounds like another Blue Bayou to me. Diane

Definitely not blue moon

You can buy quicksilver on great garden plants .com

Definitely not rainy blue. Rainy blue has different flower form and a more low spreading bush shape.