FWB being controlling

So I been with my FWB for for 4 years, but recently whenever we see each other we are always arguing, for little things. He’s super controlling and jealous. He has to know where I am all the time, if not he is always thinking I’m messing up, which I am Not. He is the only FWB I have. But sometimes I think to myself, if he is the one that is sleeping with other girls, because of the way he treats me. I can’t talk or text other guys because then he gets mad, I can only talk to him. Is this right???? Also he tells me we are exclusive FWB.. 🤔