I'm (24F) deeply hurt by my GF (26F) and I don't know how to navigate it.

We've been dating for about 5 months and grew a lot closer as she comes by my house a lot, she sleeps with me and when I wasn't working due to vacations, she stayed in my house almost the entire week. I love her a lot, but I'm severely depressed (she's as well) and autistic, so I'm not entirely aware about emotional fluctuations. 3ish weeks ago our personal lives (apart from each other) began falling apart and our depression hit like a truck, she was my rock in these times and I felt our relationship was the only thing I was doing right. I tried to stay strong for her, buy chocolates, to visit (she lives 2h away and I can't drive), being a hearing ear and a shoulder she could cry on. Well, last week we were out with friends and she got mad at me, I didn't know why, I didn't know what I did wrong and she didn't want to talk to me about it, she was really mad at me. I tried to remain calm and stand by her side and then give her space, but in less than 20 minutes she decided she wanted to go back home. When she got home, she sent me a lot of texts and broke up with me (in these texts she said why she was angry and a lot of mean things. She was still mad at me so I kind of forgive her about the things even if they hurt me) the reason she was mad was because of a misunderstanding in communication I can disclose if yall ask.

I cried a lot about the break up and it ruined my night as it was a bit early, I apologized to my friends and left home some hours later as I couldn't stop crying. She sent me some more messages about 3am (i was sleeping) asking to talk, so we talked personally in the next day. She said she regretted breaking up, that it was a mistake and that she loved me, she was crying a lot. I still love her too much so i took her back and we're dating again, but something inside me broke and I can't handle it.

I feel like there's my girlfriend before the breakup and there's her after it, I'm deeply hurt about the separation and can't really forgive her for it. I'm so so guilty about it because I love her so much, I want to marry her someday, but all of this is eating me alive. I don't hate her, I love her, but I can't forgive her entirely. Idk how I can talk to her about it, shoul I talk to her?