Stay with whomever you're with. It's better. I promise. The last thing you want to do is ruin something when maybe you just have to talk it out.
I cheated on my 7th grade girlfriend, and couldn't tell her until my junior year of high school. She's happily married, and I, for one, am happy for her as well.
And, no, there are no poems dealing with love affairs on this blog. However, I do enjoy John Legend's song "She Don't Have To Know".
…another one of the random things of this week, you are.