Is it wrong if I cheat on my husband if he cheated on me first?

Hi, I am 42 and from California. I have been married for 22 years and 2 years ago I found out that my Husband had cheated on me at least 2 times…Once with a childhood friend of mine. I have not cheated on him at all but lately I have been finding myself looking and thinking about other men in my apartment building. I told my husband 2 years ago that we would work this out and as far as I know he’s not since cheated on me.. I am not feeling bad for thinking about cheating, I am just worried about feeling bad after I make it a reality. I can’t believe he cheated but I can’t hardly live without revenge…Is it wrong to cheat on my husband if he cheated on me first?