“Boyfriend advice needed asap!”

This may seem stupid, primarily because it is but I don’t know what to do.. Im 19 and have been with my boyfriend, who is 22 for over a year now.. I’ve recently started college.. I’m starting to think he’s not right for me based on the fact that when I entered college I found so many other people that were like the male version of me: all sharing the same intellect and common interests, although I’m not sexually attracted to anyone, they’re all great friends! I don’t know whether I’m overthinking it or not but I can’t help feeling that my boyfriend isn’t the lad I’m gonna marry.. I know I’m young and that shouldn’t even be on my mind! – but I can’t help realising that I feel this is going to end someday.. He’s perfect but even the simple things like the way he’s not interested in the same sport as me is starting to freak me out! I’m not even sure what I’m trying to say but I just want to know am I crazy or am I being rational- is this just a phase I’m in? Or am I too young