I've been talking to this girl for 4 months till this moment, we really had great times together, we met online, and I started to like her and love her, i told her everything and she said she's still not ready yet with anyone and I promised that I'll wait for her, we were talking everyday, and I told her everything about my issues that I have abandon issues I told her about my insecurities, we seemed great but after a while she blocked me out of no where then came back, she said her friends dared her, I forgave her because I loved her for who she is, and her friends dared her, and then after a while she did the same but she insulted my insecurities before blocking me I got shocked and blocked me without letting me to understand a thing, and then again she came back she said she got mad over something and that's why she did that, I forgave her again I told her every human beings make mistakes we are not perfect, We talked again and I talked about her to my brothers and they got curious about her and I showed her story to my brothers, without her permission, I didn't feel guilty that time because I didn't know it was something she hates, she never mentioned anything like that But I literally deleted everything, her pics, even in my recent deletes I didn't tell her about it, so we kept talking, and we made a lot of promises together, she promised me she never leaves me no matter how hard it gets, she also promised me she will fix everything with me, she also said we'll forgive each others, and we kept talking

For the third time she blocked me again, and got me worried, but after a while she came back she accused me that l ignored her, which I didn't at all, I spent one whole year to get into my final exams, but I literally ignored my all studies which it could decide my future because I have the exams in couple months, but I didn't want her to feel ignored, i forgave her again, she said she won't leave me almost every time, but again she did it again accusing me for doing something I didn't, without zero communication, I accepted her again, because I knew we all do make mistakes, I promised her I won't hide anything from her and I won't lie to her, and unfortunately I did the same mistake as before, showing her to my brothers, but this time I knew I made the mistake, I felt guilty, which most definitely I was in wrong, and these two things I did, was literally the only thing I did wrong, but I promise I didn't do it to hurt her or to do her dirty, I was scared to tell her at first because I knew it'd hurt her and she'll block me again, and honestly for the whole 4 months I was living in stress and fear, because every day when I woke up I thought she blocked again, I admit and I take every single accountability that I tried to guilt trip her sometimes, I’m genuinely regret it, like I don’t even talk about my problems to my closest family because I’m afraid if I guilt trip them, I admit I tried to guilt trip her sometimes but I grew and not doing these things anymore

she always made me stress and hurt by reposting things about future husband stuff, I told her if that future husband stuff means me? She said (idk ) that made me MORE stressed because i was thinking that it was very very possible for her to replace me or abandon me So l was scared to tell her, but I made a promise that I won't hide anything from her, so I told her about the recent mistake I made, she got really really mad, and didn't let me talk at all, she insulted me again and blocked me, I took full responsibility for this mistake, I didn't want to hide it again, I apologized a lot, like a lot, but she didn't accept it, and after two days she blocked me, she came back again

She said she was mad because I hid it for a week, (I'm not talking about the old mistake ), and I explained it to her that I didn't hide it because I wanted to manipulate her or to make fun of her or to hurt her, completely the opposite, I didn't tell her because I didn't want to hurt her, I didn't want to lose her, but I don't blame her also, what I did was clearly stupid, and for now she said she's not sure if she wanna forgive me,

My question is, what should I do? If she forgave me, should I tell her that I did that also in the past? I genuinely hid it because I didn't want to hurt her and make her suffer, but it was wrong I admit it, I own my all mistakes, but l'd rather get hurt than hurt someone else, that's why I didn't tell her at first, and her reactions made me more stressed I'm worried if I broke any of my promises,

I wanna know what to do? What should I do? I wanna know if all that was my fault, because I didn't skip any part anything I'd be glad if I get the advice

UPDATE: she's already talking to someone else right after these

TL;DR: 4 month of talking to a girl got vanished, because I made a mistake and told her the mistake I done, I apologized for it and own it and took every responsibility for it, what should I do?