FWB ISSUES?!

So my fwb and I are both really sassy/sarcastic people, but lately the stuff he says has really been pissing me off. He calls me "bitch" a lot more often and when we hook up he just treats me different than he did in the beginning. We had a big fight and he ignored me for about a week and then he decided we would settle it with a "punishment" (we're both kinky in that way so no, he wasn't taking advantage of me or treating me poorly). But since then he has been very rude and he talks to me like I'm some innocent little girl who knows nothing about life. I just feel like if this continues on any longer I might have to break things off. He makes me so happy, but his attitude is getting out of hand and I'm not sure how to bring it up. He was really someone I admired and looked up to and I don't know if the fight changed how he feels about me but it's really been getting me down.