Am I just jealous or something?

sounds like you have feelings for this guy as more than a fwb...why not tell him and see where it goes?does he like you?obviously he likes the intimacy between you two(mind you,intimacy doesnt have to be just )but if you like him as more than what it is...my first thing to do would be to look for more signs of interest towards you as more than a fwb...(i.e.calling alot to hangout,holding your hand,looking at you alot,always wanting to be with you or talk to you,ect.)...if he does,you are golden:)