I really need help with jealousy. Any one that can help!?

For some reason, my brain gets upset when my boyfriend hangs out with other people. I know I shouldn’t feel this way, but sometimes I can’t help it. I understand that he has a life outside of our relationship, and that’s great. He reassures me all the time, in fact, he often tells me he would rather spend time with me than with his friends. He’s a perfect partner, and I love him more than anything. However, I don’t want this to become an issue in our relationship. I know why my mind thinks this way, even though I don’t believe it to be true. My brain keeps telling me that he would rather be somewhere else than with me. Those words repeat in my head every time he’s out with friends, and I don’t know why. I want to find a solution to this obsessive and jealous thought so that I don’t ruin his time with friends. I really need help with this issue.❤️

My therapy has really helped. But… I am still finding new ways to make myself feel horrible. It’s like there is a little part of my mind that is afraid to let go. I ask myself why this is and I am still looking for the answer. I fear that this is just my burden in life. I wish my wife had saved herself for me. Now I just worry and compare myself to ghosts. It’s pathetic and frustrating. It is soul crushing because I let it be. I wish I could crush it instead. I’m sorry if this is discouraging, I just needed to vent.

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.