Advice needed

So, there's this guy at my school that I like, and this is the first time I've felt this way about anyone. He is in all of my classes (not counting electives) and it just tears me up. We aren't really friends but I really like his personality and would like to hang out with him. I am able to contact him with Instagram, but neither of us use it often. I want to be able to confess my feelings to get it over with so I can get over him if he rejects me, but I don't know how. Also, I hear his family is really religious and feel like that may make him have to hid if he is gay. (BTW I'm not sure if he is gay or not) I would really appreciate some advice, thanks!