I thought I trusted my ex while I was with him, but after he dumped me I started wondering whether he'd been cheating on me. I think he may have, but it's been a couple of years now, and I don't care any more. I trust my current boyfriend 100% and I know that he wouldn't have sex with anyone else behind my back. Having said that, I don't count looking at other women, or flirting with them as cheating, because I do it too, with men and women, and it'd be kinda hypocritical of me to hate him doing it. Doing that kinda thing isn't serious because we live together and at the end of the day we'll be going home together, it's just a bit of fun, and frankly I'd hate being with anyone who was so paranoid they thought that looking at someone else meant I was gonna jump into bed with them.