I (28F) am in the same situation as your girlfriend right now. My new boyfriend is uncomfortable with the fact that I'm still close friends with my ex. It doesn't help that my ex still has pets at my house (his apartment complex would no longer allow pets so I took them) that are a constant reminder to the new BF of my old relationship. I totally understand where he (and you) are coming from, and that it is a very uncomfortable situation, especially if you're insecure from past bad relationships. The thing is, I wish my new BF knew how little I feel attracted to my ex, and that any feelings left are truly platonic. I love my new guy so much and tell him how great his it to me all the time, but no matter how much I tell him he is still very uncomfortable with it and brings it up every couple weeks. I am considering getting rid of my exes pets so that at least there is not that reminder there for him, but they're like my pets too and it makes me sad to give them up. And even if I do give them away, then I think will that be enough? Is he still going to hate that I talk to my ex as a friend every now and then? Will he still have trust issues even when this situation is resolved? I don't want to completely cut off a good friend from my life, and I wouldn't ask him to do that. Since you're in this same situation, what would your GF have to do to reassure you that your relationship is the most important?

As for your GF, its not very considerate of her to praise her ex so highly to you like that. She should be with you because YOU are the best man she knows (side note, my new boyfriend is a million times better than the ex, and I've told him that!) I think you should sit down and clearly explain all of this to her and how it makes you feel. Thats what my BF has done with me and its really got me questioning things and trying to find a compromise that can make us both happy.