Whats wrong with me?? please any suggestions?

I WANT the normal, a fun life, dating tons of girls, going to the clubs, wanting to belong to a "group" going to college, joining a frat, do the whole "normal" thing. But for some reason i cant force my self to change, since graduating high school i cant get my self out of this chain. the last 3 years has been an EXACT same routine. i just want the "normal" cuz i never had it, in high school i was really overweight and self concious, i had lots friends but i was always self conscious about my weight. i never dated or went to prom or any parties. I just feel like im missing out. i lost all the weight and work out all the time but im still in the same self conscious mind that i cant get out of. whats scaring me from pursuing all the things i never had and want? i feel like im gunna have a break down or mid-mid life crisis, i feel like im failing life. i feel like im gunna die with so much regret, i feel like i am capable of so much but just give up and cant pursue anything, im ashamed..