I've never really been in a relationship until her and she's been in 4 previous to me. All I can think about are her exes. What she did with them. How she was with them. Did she love them? Are they better than me. I'm extremely jealous and envious that they were with her before I was.  I'm curious if this is bpd thing or my relationship immaturity. For context I'm 20, and she's 19. We live together but I still think about her exes every single day. It causes me so much stress, anger, sadness, and a ton of anxiety. Sometimes it feels like I can't even look at her. Shes great for me and really understanding but every day I ponder the thought of breaking up with her because of this. I just want to know if anyone else suffers from this and if so, how to overcome it.