Sharing Our Innermost Thoughts

Sorry for a long story - I was in my first relationship for 2.5 years but on 26/Aug 2023 I got dumped by my girlfriend whom I loved a lot. Before me she was in a relationship with someone else and they broke up. After 2 months of her previous relationship ended, we started talking and developed interest in each other. I emotionally supported her a lot as she was insecure because of her past. I gave my 100% to her and used to spend my monthly salary on her just to make her happy. She used to abuse me initially but I used to consume her rage and never argued with her thinking that it might be because of her past. After all I’m a human and after 2 years of abuse and complaints I started feeling frustrated and angry and argued with her. But I never stopped doing things for her. I always wanted to make her happy. She always rejected my feelings because whenever I used to tell my feelings, she would think that I am blaming her or I’m starting a fight. Money was never the reason for her being with me that I can assure but I don’t know what happened on the day of breakup. I told her that I have started investing some amount of my salary. She is a working woman but never paid for any of our dates in 2.5 years. I confronted this to her and she left me. I begged for 1 week to come back but she did not and the reason she gave me was that I was not treating her well and was always being angry. Now it’s been 1 month and I have this guilt in me that I might not have treated her well. I’m still begging her to come back but she is ignoring. Please help me with this guilt.