If the stem has 4 sides,(and it looks like it does)Its in the mint family.
Does it flower? and if it does, what do they look like?

THe stem is somewhat more square than a other stems but it's not square like BeeBalm. It has no scent. i haven't seen flowers yet. I will keep an eye on it for flowers, though, as that may be the only way I'll get a positive ID. thanks.

I just read this:

Note that there are a handful of other plants with square stems and opposite leaves, which may be confused with the Mints. Those plants are found in the Loosestrife, Verbena and Stinging Nettle families, but none of them smell minty.
Could my plant be loosestrife?

Its not loosestrife, loosestrife leaves have a smooth edge. The leaves of this plant are serrated.

I was looking at the vervains and its not familiar to me. I would recognize hoary vervain, and its not that, either.

It looks like a nettle to me. Its not stinging nettle (Urtica diocia) because the diocia leaves have deeper lobes. But it could be Slender Nettle (urtica gracilis) which doesn't have as much sting as the other.

I was thinking Virginia Copperleaf but now i thinkg I am wrong. I am providing a link for it anyway just in case.

Here is a link that might be useful: Virginia Copperleaf

Hi I have been studying photos of nettles and they seem to have "veins" running along the leaf longitudinally from tip to stem, if that's not a confusing description. My pictures don't look like that to me. I'm really lost. thanks for trying to help me.

Hello for those who tried to help me, I got this email back from the New England Wildflower Society:

ItÂs hemp-nettle (Galeopsis tetrahit), a member of the mint family (swollen stem below the node a good indicator!). ItÂs non-native, but not considered invasive

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