amie711 - I am afraid this Forum is almost completely moribund. I have responded on the Name that Plant Forum which is very much alive and where you are far more likely to get answers to id questions.

One reason for the lack of responses may be because it is not very clear (the picture). And there is no description, eg, is it a woody shrub, has it got thorns, what size & shape are the leaves (a close up would be useful) & what size is it? Judging by what I can see I very much doubt it could have grown to that size in one year.
As for flowers some shrubs have very insignificant flowers that you might not notice.
It cannot be a weed as such, although what one person calls a weed another welcomes into their garden. In other words it depends if you like it enough to keep it.
Sorry I can't be more help.