confused about my girlfriend

I think the first thing I would do is ask her, open communication is vital in a realtionship. Tell her about your feelings, and see if she is in the same place as you. It is not always an easy conversation to start, but after you've had it everything should be a lot clearer. I'm hoping everything works out for you!

Peter,I am listening. If you would like some feedback from me, read on:The definition of insanity is doing the same thing over and over, expecting different results. This definition is true in cases where we repeat behaviors. It is also true in cases where we analyze situations repeatedly. The insanity part comes into play when the analyzing thoughts become worries and then anxiety.What I get from your post is that you have been analyzing your relationship to the point where it has caused you to feel worried and anxious. My feedback for you is that you do something different than what you have been doing. It may serve you to talk with your fiancé. You could express your insecurities about her commitment to your relationship. She may reassure you that she is committed to you, and that may be enough to ease your heart. If that isn't working for you either, you could set boundaries with her. If her talking with her EX is a trigger for the insecurities that you are experiencing, together you could set boundaries that will work for both of you.

overthinking will only make things complicated.if she's till involved with her ex then no matter how much it hurts you u have to let her go..but before that u need to have a proper chat with her.it'll be difficult for u but u know its very simple u just have to let ur honest feelings out in front of her,please don't get angry making her hard to answer you honestly.just try to have a proper conversation with her once and if she was not involved then also u should ask her to tell you about her feelings for her ex so that u don't have any second thoughts about the relationship you are sharing with her.