I cheated on my gf

I spent the new years with my woman and we had a blast. We had a long talk about the relationship and we ate and cuddles while watching a movie. We was in the bed and I was sleep and she was watching tv. Next thing I knew she was up and packing her things about to leave. Long story short she went through my phone and I am embarrassed on what she saw. She has my password and I told her if she wants to go through it she can I’ve told her this before this happened. I have deceived her before so I have the password because I didn’t care.
I guess I never thought she would actually go through it so I didn’t think to hide anything. She saw me talking to numerous of women. She saw my social media dms and all. She saw messages I was sending with another woman about starting a relationship. Me saying I love her etc. I lied to her and made excuses when she confronted me. I saw she was hurt she was crying to me but calm. I hate how I hurt her. She is a great woman. I don’t know if I just like the attention from other women and it feeds the ego. But my girl give me so much attention and love. Please help me on how I can get her back. I just heard from her niece that she has been in the bathroom crying. She just had a bad asthma attack and the ambulance had to be called. It’s all because of me because she was good before. I know I caused this. She hasn’t told anyone else because of hurt and embarrassment because she speak high of me to her people. This is now her new years went smh. Please help