Will my husband really change after cheating multiple times?

I found out my husband of 2 years (together for 11 years) has cheated on me through out our relationship, engagement and marriage. Mostly with online women and onlyfans. After I found out, he said he's very sorry and he's going to change (he didn't tell me about any of it, I found it all out myself) he's showing me that he's changing but I don't trust him, should I believe him or should I leave????