Is this new crush throwing me off? Or am I developing something here?

My boyfriend and I only dated for 3 months before starting long distance, I see him about every two months or so. But this one guy at work has been really nice and attentive, is this why I have developed this crush? I feel like this crush is growing,I still love my boyfriend, but part of me is curious as to see what a relationship would be like actually being in the same place.