It's great that you felt a connection with him and that you enjoyed your talks. Maybe he got the feeling that you're looking for something more than he is/was looking for?

It sounds to me like you made an emotional connection with him. I don't know this person and I can't speak for him but if I had to make a deduction I would look at the situation.

He's young and in college - When I was in my early to mid twenties, I was more focused on going out and having some fun be it at a party or bar, enjoy the moment and wake up looking for the next moment to enjoy.

The way that it seems is you let on to him that there is an emotional tie and this probably freaked him out as younger men are more or less living for the heat of the moment without an attachment.

I can't say that this is absolutely what's happening here - I may be way off base, but it does seem that the two of you had different end games.

Perhaps you can try to reconnect with him by apologizing for deleting him as a friend from FB and offer to meet up w/him to just have some fun (i'm sure theres something you two have discussed that you can both enjoy doing).

It's easier to just click that delete link but once you're in person and talking face to face he may see what he's missing out on.