need some relationship help.

okay, idk what is wrong with me but I'm in high school and all my friends are in a relationship and I'm not. I really wish I could find a right guy for me but I just can't. all my friends seem happy and in love and I'm always third wheeling bc I don't have anyone and I don't really know how to talk to a guy, like I always freeze up and never know what to say. I hope someone out there can give me some advice. I just don't know how my friends do it.