I really wouldn't be able to mentally handle being cheated on. I would refuse to believe that my partner was cheating on me unless they told me themselves, and then I'd probably be like "Oh, they admitted it, they're sorry, it won't happen again, we can be together and happy" and all that shit.
On the other hand, I get jealous really easy. Like, oh, say I had a boyfriend and he's talking and laughing with a girl I don't know. I swear to God I'll have mental images of me pushing her in front of a car or some shit, I'm so crazy. I'll get all worried and I'll probably have to go up there and like put my arm around him or something.
It's a good thing I'm single.