Please someone tell me I’m not the only one.

My ex boyfriend broke up with me last summer and it was really rough on me even thought we only dated for a little while. He treated me terribly but I guess I wanted it to work. However during the fall I was healing well and met my current boyfriend. I knew him as a kid and we reconnected and started dating. It’s the most WONDERFUL relationship ever and I love him so much. However for the past couple months, on and off, I have been obsessively thinking about my ex, to the point of feeling so sick to my stomach. Just the thought will do it. I have been stopping myself from checking his instagram because that just makes it worse. I do not want me ex back at all and I am so happy now. I recognize these thoughts as intrusive and hurtful. I just want them to stop and be in the moment. Has anyone had a similar experience? What did u do? Also, I want to tell my boyfriend about this but I am unsure on how to do so.

I stated dating my boyfriend about 3 months ago. This is my first boyfriend ever. He’s been in 2 serious relationships in the past and multiple sexual partners. I’ve had neither. When we first started dating/ at one point were just friends, he told me a lot about the last girl he was in a relationship including their sex life. Fast forward to us dating for about a month and I found out he had been texting her. We almost broke up. But also for context she broke up with him because she figured out she was a lesbian. But still… anyways we moved past it. And now… I’m sure we can all see this coming… I have this theme! I think about his ex gf all the time. I stalk her on social media and try to find hints and clues about their relationship. I compare myself to her. It really impacts my relationship because I’ll get mad at him for no reason. For example we went thrifting recently and he picked out stuff that completely wasn’t my style, but was hers. Which made me spiral. Is he purposely dressing me like her? Does he want me to be someone else, someone like her? The whole texting her thing was put in the past. I’ve forgiven him. But I can’t help but have resentment towards him and think/ visualize all these thoughts about them together and how I’ll never measure up to that. It makes me think I shouldn’t have got into a relationship. That maybe I’m better off by myself. But like all of us. I wish I didn’t have these thoughts. I wish I could believe he liked me for me. But sometimes it’s really hard.

I feel like I really need help right now. I keep reminiscing on my old relationship and comparing it to my current one. For context, within my old relationship I had been with him for a pretty awful year and 3 months. Within the first 3 months I realized that I didn't actually want to be with him, but I felt sorry for him. So, I stupidly started self sabotaging the relationship. I know that it was stupid, and I tried to break up with him but every time I felt bad. His mental health was already bad and I hate any possibility that I can make someone's mental health worse. That whole "relationship" was so toxic on both ends though. All of that alone has me so messed up. But with that I also had this false attraction to him. Like, I would always be figuring out what I wanted in a relationship and tried to do that with him despite knowing that I didn't actually want to be with him. Now my mind keeps trying to convince me that I'm doing that with my current relationship. I know that I'm not. This one feels genuine and it's pretty healthy. We have our bumps, but we both have this want to fix it and it's just so nice. I hate that my brain is trying to ruin this for me.