Absolutly Not!!
I always loathed cheaters. My ex wife cheated on me multiple times before we divorced. I always prided myself on my fidelity.
Well, my next serious relationship, I broke my code of ethics and found myself cheating. I could go into what drove it, but it still was cheating, and it still was WRONG.
I'll save the long drawn out story, but if I can give any advice it would be...
If you are in denial about your sexuality (in the closet) it will eventually eat at you and could potentially cause a lot of pain to you and to others.