I can't get over my boyfriend's last relationship. He doesn't tell me much about it. Should I encourage to tell me more or is it better not to know?

I feel like I tell him more about my past experiences than he does. He's only had one relationship before me but he doesn't really talk about it in details. I try to play it cool but I'm burning inside. I want to know everything but I know I can't handle it. I feel grossed out by myself because I'm so immature and insecure. I stalked his ex a few times to see if she seems prettier than me and I feel pathetic. I kind of told him about this before and I felt so ashamed. I don't wanna hurt this relationship but I think I'll be at peace if I know everything or maybe I'll become more insecure thinking she did things for him that I'll never do.

I can't get over my boyfriend's last relationship. He doesn't tell me much about it. Should I encourage to tell me more or is it better not to know?
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