Hi all. I've been in a relationship for a little over a year now. We were just friends for awhile before feelings started developing between us. He had just broken up with someone he'd dated for 3 years and I had just broken up from a 2 year relationship that ended badly. We helped each other get through the rough time. About 6 months into the relationship, he confesses that he was still having problems with missing his ex and he needed time to get over it. It hurt me because all this time he had made me believe he was ready to move on. About 3 months ago, he said he felt he was finally over it and could view his ex as a "friend". The problem is just that -- they have decided to remain friends. She has a new relationship also. She calls him nearly every day and even though I know he loves me, I get so jealous when he talks to her. They don't see each other in person (I don't think I could ever handle that) but I feel threatened by her and I don't know how to overcome it. She has asked to talk to me several times, but I am not ready for it. He tells me he has no interest in her anymore, but that he values her friendship, and that I should not judge someone I don't know. He has given me no reason not to trust him.
Why do I feel so threatened by their history together and how can I overcome feeling so inferior to her? And how can I stop making him feel guilty for things he hasn't even done? I've been cheated on before in the past and I know that is affecting me. I'm sorry this is so lengthy, but I appreciate any advice