Fiancee[m25] cheated again

I [22F] found out my fiancee [M25] cheated on me and it's not the first time either. Im tired of him cheating on me. I found out because I joined his TikTok live and said babe to him his side piece DMed me asking why I called him babe. told her why showed the proof. I am a very kind hearted woman so ive mostly forgiven him with the other times hes cheated. Hes upset with me because I told him the only way I would even reconsider getting back with him is if he got actual help in the form of therapy. We also made each other a promise that we wouldnt be trying to hit anybody up romantically while in the break we're in im almost positive hes already sending more nudes to other women. We were together for 2 years. I never cheated on him once nor ever gave him a reason to cheat. I feel like those two years meant nothing to him.