Another valentine's day spent alone

Alright, I've tried to find someone and I just can't. I see all those happy couples on the streets and I just want to die. I need someone to hug, to talk to, someone that could make me happy. I had 4 gfs already, but none of those were good, I didn't feel happy around them etc. And none of these evolved. I still haven't had my first kiss and first time. It's all just sad. I had(and still have) a huge crush on this one girl and I've tried asking her out and she said no. Maybe there's something wrong with me? Idk what to do, where to look etc. Please help