Can fwb turn into a relationship?

Ive been fwb with a guys i like for over 6months, we have had sex 2times over that whole period i see him twice a week. Catch is it feel like a relationship, i sleep over, we go out to movies and we order pizza and talk all night. Do you think this is fwb or a relationship? Even though he hasnt asked me out? But he never had fling with other girls while we have started fwb