/lit/ - Literature

Ran into my ex at the bookstore today. She seemed happy to see me, asked to see what I'd bought and talked for a bit. She was pretty when she smiled. I fled back to the car and drove home in a cloud of cigarette smoke and regret. Can't go back though, I cheated then left for the other girl. Other girl then said if I'd cheat with her I'd cheat on her and that it wouldn't work. She was probably right.
Is fidelity hard or am I just a slave to lust and impulse? Can my nature be overcome? I want virtue, but don't know how to cultivate it.