I dont think its important for a significant other to share the same interests as you but they should be able to at least support you. For example: i hate horses; however, if i liked a chick that liked horses id be willing to support her hobby of riding them or uh... whatever else you do with the stupid things. It's part of a mutual respect you have to have for your partner. She sounds really selfish and kind of immature; hanging up the phone if you bring up a topic she doesnt like. Really? That's so childish. I would try and sit down and have a serious talk with her. If that doesnt work then maybe you need to think about taking a break.