Do guys ever catch feelings for their FWB?

I've been hooking up with this guy lately and he's being weird... While we were having sex he asked if I was "f***ing anyone else" and I said no and he said "are you alright with that?"

...I don't really understand what he meant by that and should have asked. Any ideas?

Also, we were supposed to hang out but then he had to work so we rescheduled and he worked through that and by the time he was done I had another engagement so told him I can't hangout and now he will hardly talk to me.

Do guys catch feelings? I chose him because due to his life situation and his actions I figured this wouldn't happen with him...

Do guys ever catch feelings for their FWB?
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