If it hasn’t been the same between you guys for a while then I think it’s time that you bring it up! Who knows, maybe he feels the same way, or maybe things will be even better afterwards. All you know right now is that you really like him, and you can’t change that or run from that; you have to face that. If the feelings already there, and things are already started to get weird between you two then it seems like you have nothing to lose. Just be confident and go for it! The last thing you want is to have to look back and say “what if.”