ok well first of all, tell your bf off cuz he's being a little bit douche-y... who complains about 34DD boobs?!?! if he's not happy with how you look, he can take a hike! and second, well, moms will be moms...
i do know how you feel though. it certainly isn't nice to be on the receiving end of those comments, especially when you KNOW you have gained a bit of weight and really should get around to losing it, but just can't make yourself care enough to actually do something about it.
i know. i was there all last year. i finally got my kick in the butt in november. but before that i would just keep on stuffing my face, while getting more and more frustrated at my ever-expanding belly (and arms...). i knew i should lose weight but each attempt to "be good" would last only a day or two before i returned to junk. you say you want to do this for yourself, but you really don't. when the time comes when you do, really REALLY wanna do this for yourself, you'll do it, and you'll commit to it. if you're not ready then you're not ready, and it's not like there's anything wrong with that either. just don't make other people's opinions feel like you HAVE to do something about it.
losing weight when you love food too much is just crazy hard, so you need to have really strong motivation. if it's not there, you'll just end up failing and yo-yo-ing and maybe even fatter than you started out at. just take a deep breath, think about this really hard, and decide to do this for you and forget what others are saying.
or don't, and learn to be happy with yourself the way you are, after all, 160 is really not that bad
wish i was there myself!
good luck!