Is there anyway to increase the size of my ...?

..without surgery. Or a good easy way to put on weight? I'm 15 (very nearly 16), 112 pounds, 5ft6 and an A cup and I find it sooo painful that I just don't seem to grow in the chest area or that I just don't seem to ever put on weight (I'm really scrawny). I feel like I've been majorly screwed over by my genes as all the women in my family are quite big and then here I am just completely flat chested and I find it really painful as I get teased by practically EVERYONE I know. My friends make fun of me for it, guys make fun of me for it and then even my family make fun of me for it and I just can't do anything about it and Its just so painful that as stupid as it sounds I actually cry over it! Now I've tried to put weight on in hopes that maybe that then my problem would be solved but I just cannot seem to put on weight. I tried to increase the amount of calories I eat as well as keeping it healthy so I'm not just binging but all to no avail.I am a vegetarian as well if that helps at all but i do like to make sure that I get enough protein through eating nuts so I don't think it really affects anything or at least I don't think it does. Can anyone help me?