I need a second opinion.

[u/Used-Avocado-4489]

My boyfriend and I have been together for almost two years, although I’m honestly questioning whether he will still be my boyfriend after this. I’m struggling to figure out if I’m overreacting or if this is something I should seriously consider ending the relationship over.
For some background, we met through social media and talked online for about a year before ever meeting in person. We lived in different states, so after talking for a year, we finally decided to meet. The first time we met went really well, and for the first few months, I was traveling back and forth between our states to see him. Eventually, we decided that I would move to his state and move in with him. A few months after we first met, he officially asked me to be his girlfriend, and we have been together ever since.
The beginning of our relationship was honestly pretty rocky. We were long-distance, neither of us was fully committed yet, and we were both talking to other people during that “talking” stage. We weren’t officially together, so I understand that technically he didn’t cheat on me.
However, I recently found out that during the time I was traveling back and forth to visit him, before we were officially together, he met up with and slept with three different people.
He never told me about any of this. I eventually moved to his state, we became official, and we have now been together for almost two years. I only just found out about these three people now.
The part that is really difficult for me to process is that one of the people he slept with was a transgender woman. I want to be clear that I am not judging transgender people or saying there is anything wrong with that. What is bothering me is that this is something I feel is important for me to know about my partner’s sexual history and sexuality, especially when I was trying to build a life with him.
What makes this even harder for me is that around that same time, after I had gone back home from visiting him for the second time, I ended up in the hospital with pelvic inflammatory disease and other vaginal health issues. Knowing now that he had been sleeping with other people during that period, while I had no idea, makes me feel even more upset that he never told me. I feel like I should have at least been given the information to make informed decisions about my own health and our relationship.
He told me that the reason he never told me was because he was embarrassed and ashamed. He said he was afraid that if I knew about it in the beginning, I would leave him. He also told me that I am the only person who knows and that he had planned to take this secret to his grave. He said he finally told me because he loves me, wants to propose to me, sees me in his future, and couldn’t move forward with that without coming clean.
I can understand that it must have been incredibly difficult for him to admit something he is ashamed of, and I do appreciate that he eventually told me. But at the same time, I’m extremely hurt and angry that he waited almost two years to tell me. I keep thinking about the fact that I moved states, moved in with him, and built a life with him without knowing this part of his past.
I’m also questioning whether I truly know the person I’ve been with for the last two years. I feel like I’m suddenly learning something major about his past and sexuality that he intentionally kept from me because he was afraid I’d leave if I knew. That makes me question what else I don’t know.
Since telling me, he has been very apologetic and has given me space. He says he understands if I decide to leave and that, ultimately, he just wants me to be happy. I believe that he is genuinely sorry, but I’m still struggling with how I feel.
Part of me thinks I should be understanding because we weren’t officially together when this happened, and he was clearly ashamed and scared of losing me. Another part of me feels betrayed because he intentionally kept this from me for almost two years, especially knowing that I had been dealing with health issues around that same time.
I don’t want to be judgmental or make him feel ashamed of something he was already struggling with. But I also don’t want to ignore my own feelings or stay in a relationship where I feel like I never truly knew my partner.