I think there's an easier way to "clarity." It's just sitting down with the guy and having a heart-to-heart about what each of you, really, sincerely, want from the relationship. In such a conversation, he would have no reason to misrepresent his position, since he knows you're okay with FWB's.

If, on the contrary, you just drop him in a nasty way, cutting all ties without explanation, you'll simply alienate him and destroy the possiblity of any relationship at all, including an FWB.

A hundred years ago, there used to be a male philosophy (just among some men, not all) regarding dealing with women: "treat 'em rough." That's no longer something any decent man believes, something now limited to abusers. But the same slogan now seems to have been adopted by some women. And it's just as inappropriate coming from the female side as from the male side.

If you're in an abusive relationship, physical or psychological, then get out, immediately. Don't put up with any kind of abuse just to have a relationship. But I think it's possible to have an FWB without abuse, unless, of course, you believe that an FWB IS abuse. But on that point, everyone has to make up their own minds.

Anger has no place in any relationship unless one of the parties is overtly doing something wrong. The fact that they might not want to commit is not a legitimate basis for anger unless they have in some manner misled you into thinking that they might want to commit. That, of course, is called "stringing along." And 'stringing along" is wrong.

But if you're both straight with each other, and treat each other decently, I still can't see any problem with an FWB.

Take care!