I'm cheating on my long time girlfriend and she deserves it.
Is that your real reason for cheating? Or you think it is?
It is my real reason. How can you cheat on your girlfriend if she doesn't deserve it?
Now I don't know what she did to deserve it, but you shouldn't stoop to her level. You should either talk through the problem or else dump her.
I just wanted to have sex with her friend, but I have a feeling I might be falling in love with her friend.
If you think you're falling in love with someone who you aren't dating, you should end the relationship you're in now. It is not fair to the person you're in a relationship with or the person you're cheating with to carry on with both relationships.