Could it be honeysuckle?
At the back corner of my backyard are hedges that separate me and my neighbor. Neither of us take good enough care all the way back there so the hedge is chock full of weeds. There is one weed that is both pretty to look at and smells heavenly. I guessed honeysuckle because it smells like my honeysuckle body wash. Here is a pic: I have been busy pulling up mustard and clover and friggin' mulberry saplings from out of the hedges back there, but these smell so good and look so nice. Will they cause trouble if I leave them?