Should I be bugged if her ex-boyfriend invites my girlfriend to hang out?

yeah if i was you i would be kinda bugged by that too. i guess that it depends on the context that the text was in but i cant seem to think of a way that would be no big deal..... maybe you should find out how much contact they actually have. But look at the bright side--- it could be a lot worse. just dont do too much spying because thats kinda creepy. hope that helped and good luck!!!