I had massive insecurities about having sex
- because my boobs are almost non existent -
I used to think that I just didn't look womanly enough or that I was a joke and the guy would just laugh or be disgusted. It took a long time before I'd have sex without a top on and I even dumped one boyfriend who was seriously sweet and charming because I couldn't bare to let him see me naked AND thats when I was about 125 pounds!
I eventually realised that it didn't matter and that I have what I was given and there are other bits of me that more than make up for the lack of breasts and from that point confidence grew I guess.
Like the others girls have said - he loves you for you and wont care about an extra wobbly bit! My current guy was aghast when I mentioned a boob job. He was like, you wouldn't DARE! I LOVE your body!
Needless to say...sex was not a problem that night :P
Just enjoy the moment and being with your boyfriend
