I get kinda comfortable arond guys? please help!?

Okay i like guys i know this When i watch romantic movie, listen to songs, see couple at school. It really makes me wish i had a boyfriend like in the movies were we tell each other everything, And i know without a doubt he loves me, and im comfortable with him. ive never had many bfs. Scenes school started this year Ive gone out with 3 different guys. And im not comfortable with them like I don't really want to hold there hand, or kiss them and stuff. i get nervous because there's so many people around us at school. and all these guys i haven't had huge Crush on them or anything. so im like oh geez hes walking me to my cl now. and i a really guarded person so im afraid to tell them anything and im always thinking Other people are think y is he dating her and they don't really like me its just thee desperate? and stuff. and I want a really relationship so much but when i get one it like Ugh it doesn't feel like right. what should i do? whats wrong with me? does anyone else got this problem? please help!