My secret and same problems

Starting out I was extremely shy in High school. A guy that I had a 3 years crush on in high school was the all star atleth and extremely popular. We're really close and he help me with a lot of things and he also like me a lot but he wouldn't go out with me because his friend said I was a nobody after that i tried everything to get myself better wether to learn to play sport, join clubs, go parties and be comfidence but I was still not good enought so I thought the only problem was I wasn't pretty enough. So after I graduated high school I bagged my parents to let me get plastic surgery! When I got into college I pledged to myself that I will make my college life better than high school and yes I did it! I had ton of friends, I'm a college athlete and tons of guys hit on me. But the problem is every guys that like me just want to sleep with me they never want to go out with me just like my first crush. And the same problem kept happening over and over and over again. I tried to fix everything that i possibly can to the point that I don't know where to fix anymore but I still don't understand why guys never like me for real? I lost all my confidence when this happens, I kept telling myself to love who I am but it's just so hard when I kept being rejected. I've been very stressed about this. Sometime I couldn't even bare to look at myself in the mirror.