Sad truth...need help?

I haven't had a girl friend in like 4 years, I grew up overweight ( like 230 now) but when I hit 15-16 I thought "Oh geez, better work on that, (that's when I was like 260) I still have a kind of gut and I cant get rid of it. I'm taking tennis, and playing in weather that is like 85-95 degrees outside to sweat and stuff...but I haven't seen changes in like 4 weeks. There are girls I like, but I dont want to go near them looking like this. I see phatter (lol.) guys than me getting girls, but it don't look right, lol....anything would be great: workout videos, suggestions, hints...anything, I really need help. Thanks