Why is my husband so delusional?

I'm husband and I have been married for 25 years, only 5 of them we have been happily married. We have a 20 year old daughter together. The first 10 years I dated my husband things were wonderful. Then, he started cheating on me as I planned our wedding. Then when we were trying to conceive my daughter he got... show more I'm husband and I have been married for 25 years, only 5 of them we have been happily married. We have a 20 year old daughter together.

The first 10 years I dated my husband things were wonderful. Then, he started cheating on me as I planned our wedding. Then when we were trying to conceive my daughter he got HIV from another woman. I somehow didn't get it and my daughter was okay, but things could've very well been different.

I had a good job, but then became extremely depressed and stopped working. He then cheated on me 4 years later and just frequently cheats on me. Two years later he started a successful company, and we have amassed a fortune together. The divorce would give me a lot of money but I almost wonder if it was even worth it, so stay with him this long.

He was a good dad to my daughter. He claims to love me. He tried to cheat on me again recently. I frequently tell him I want a divorce, he gets mad for a day, ignores it, then pretends like nothing happened. This happens repeatedly. He's in a weird state of denial about me wanting a divorce. I'm not sure why he's so confused. Our marriage has been loveless for at least 15 years now.
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