Dealing with insecurities I fear will ruin my relationship.

Hello Im (22 f) dating (23 m) for 6 months.

For context: I had recently gotten out of a 6 year relationship (I ended, due to communication) and then had a thing with someone shortly after that long term relationship. I also ended that because of lack of effort. That person had also just gotten out of a long term relationship as well and after I ended things they went right back with them.

The relationship I’m currently in I love so deeply. He is everything I’ve ever wanted he is very handsome and smart. We grew up differently he is white and grew up very wealthy, I in the other hand am Mexican and did not grow up wealthy. We have recently been dealing with some issues where I found out he had lied to me about his sexual past with his ex. This is most likely my fault for asking but I wanted to share special moments and some of the things I didn’t ask and he would tell me ( I have never done x) learning about this made me feel really upset because he knew how I felt about lying. Early in the relationship he was following a lot of women and ofc (rich, white, fit girls) I really compared myself and felt a heavy need to lose weight. He has unfollowed them since then but one thing that also affected me were noticing some wander eye behavior. I had never experienced this with my ex of 6 years he really made me feel like the only girl in the world.

I definitely have retroactive jealousy I compare myself to his ex a lot. His first love, first girlfriend of 3 years which she ended and he had been single a whole year before meeting me. She is white and 6f tall… I am 5”3. Also white and rich. ( I have a chronic illness as well that affects my self esteem) They have done so many things together naturally. But I can’t help but feel bad. I hate that he lied and I hate that I feel so insecure. I’ve never been made to feel this way in a relationship. I love him very much and is the person I envision marriage with. I just don’t want to keep asking for reassurance and questions. I want to be confident and sure of myself.

Feel free to ask questions about anything. I’ve really been feeling so much pressure but I don’t want that to affect us. I’ve brought it up too much. I don’t want this to ruin a relationship that I want forever. I acknowledge this is internal work I need to do. I’ve tried journaling and I have therapy but I don’t know what to tell her for us to actively work on this. I’ve done meditation but I am unsure what else to do. Any advice will help. Just please be kind, I know that I haven’t made the best decisions. I simply want to feel that peace again.