>>25327432
Can't say I've had a gf before, but I know how you feel. ever since I got an expensive laptop, every sound I hear that vaguely resembles a crack I have to frantically search the screen and around the corners. I also impulsively run virus scans all the time.

I don't think there's a good way to prevent it, just make sure that you're in control enough to feel justified that she won't go fucking other guys. also, try to make yourself seem more appealing than them, listen to her, talk to her, treat her, the works.