Should I (M24) also apologize to her (F21) for the times I did not have her consent and was very pushy? I would like to have different answers from the girls, as I have difficulty understanding them

TL;DR: She left me after five years of relationship. In the last period of our relationship, I was very insistent on doing sex because it had also become an outlet. She would sometimes give in because she felt guilty, and that made me feel terrible afterwards, but because of my mental state, I couldn’t process it well. It has been 7 months and the therapist has given me the green light to write a letter where I try to go beyond the relationship. I deal with a lot of issues and I would also like to apologize for forcing it. Should I avoid the topic or should I write it down? If so, how would I deal with it, I am usually very direct, but obviously the situation doesn’t allow me to do that

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Since after the covid, I experienced a very bad situation: working remotely all day and not talking to anyone for hours. It stressed me out a lot and she was the only person who kept me company on the phone. Throughout our relationship (just over 5 years) we only saw each other on weekends because of the distance.

She was the one who broke up with me after she told me she didn’t love me anymore. By now we were always arguing and not meeting on a weekend was driving me crazy. A bit of context: She is a fragile girl and often has problems and complexes about what others think of her.

I have now been in therapy for 7 months trying to recover and my therapist has given me the green light to send her a letter so that I can move on. There is one thing I would like to write but I don’t know how to do it or if it makes much sense, also because that was not the only problem. I would like to apologize for being so pushy and pressuring her. Having only one day per week, I had the need to do that, and in the last period it had also become a personal outlet. I felt frustrated and pressured her a lot, even when she didn’t want to. I never forced her, in the physical sense, but sometimes she felt guilty and did it because of that. This destroyed me personally, because to me every single time meant literally making love and not getting laid.

It’s been more than 7 months since we’ve been in touch, I don’t know anything about her anymore, but in this letter where I basically address my problems, the things that weren’t going on anymore and the things she said/did that made me suffer, should I get off the subject? I would like opinions from the girls because this letter is not to take her back, but I want to sincerely apologize to her because I simply wasn’t me anymore.

Sorry for english, i’m not a native speaker