Everyone tries to put me down by calling me fat... I feel hurt, what should I do?

I have put several questions of how to lose weight. School got out last week and I've started eating healthy and doing aerobic exercises for 1 1/2 hours. Well yesterday my family and I went to family friends' house for dinner. The lady said this to my mom "Don't tell her but damn she is fat, she really needs to workout... your so skinny and pretty what the hell happened to your daughter." And I overheard my mom and she was laughing... I feel really sad. I'm 5 2'' and I weigh 127 pounds. At my 8th grade graduation I recieved the highest award- Scholor of the year and girl of the year. I have maintained a 4.0 gpa. When I went up to get the award nobody clapped and cheered for me and my dad said "Nobody likes you, of course you are so fat and ugly..why would anybody like you?" I have tried so hard to contain myself but I cry myself to sleep and smile but on the indside I'm crying... My parents don't appreciate me and they call me fatty and put me down. The woman who's house we were at for dinner even said "She probably got that award because all her teachers feel sorry for her." Why is it me that everyone hates? I try my best to be a good person, and this is what I get? I'm not thinking of suicide or anything, but it seems like I'm living in hell. What should I do????????