My ex cheated on me while I was on my first deployment but it's only because I cared about her so much that I explained to her before I left that I'd be gone for a long time and that I didn't want her to be lonely and if she could find someone that would treat her as good or better than I did that she should swing their way... She said she'd never do anything like that. 2 months later she slept with some random jerkoff at a party multiple times, than told me about it while I was deployed. I've been single since than for a year and a half. Girls are evil.