Most Helpful Guy
You have every right to be suspicious and upset. Friends or not, guys and girls should NOT be seeing their exes more than their BF/GF. I'd be suspicious if my girlfriend was hanging out with her ex a lot more than me. Talk to him and tell him this bothers you. Ask him that you'd wish he wouldn't spend so much time with her. If he's a good boyfriend, he'll respect that. If he overreacts and says that their friends, he can hang out with whoever he wants to, etc. it might be time to move on. Good luck.