Am I gay/bi or just lonely

I'm a male. At school I don't really talk to anyone and have no friends outside of school. I have a never had a girlfriend (partly just because I didn't care) but now I'm like really lonely a was trying to decide if I was also interested in guys or not. I do see some guys as attractive and I would DATE A GUY I , BUT I can't imagine having sex with another man it doesn't excite me I don't think I could see any pleasure in it? Do you think I'm gay or just lonely? Thx. (Open to any questions)