<human>: Can you condense the text into a few key points?

I don't understand it. We have a great relationship, we live together, we have amazing sex, and yet I still feel drawn to randoms. I would feel awful knowing I'd hurt her, which is what would happen if I acted on this. I have never cheated (came close once, about 5 months into our relationship, sober-ish). However, even knowing how much we love each other, and that I want to marry her, I am fairly certain that given a 95% chance of getting away with it, and the right girl, I would cheat. I don't understand how I should be feeling, or if this means that we aren't quite right...
<bot>: love my long time gf, but I would still bang the shit out of other girl(s) if I knew I wouldn't get caught.