Final decision, should I stay with my boyfriend?

I’m going to tell my boyfriend tonight either that I’m staying with him after he kissed a girl the other night, or I’m leaving. He’s sent me an apology letter, a long voicemail, several texts begging to stay together, and I just found out today he went to a counselor to talk about it all and he bought a book on how to resist temptation. Note: we have only been dating for a month. What are y’all’s thoughts before I make up my mind?
Final decision, should I stay with my boyfriend?
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