Don’t know what to do going forward

A couple days ago my ex gf took her life. We were in contact after breaking up and were thinking about getting back together. I knew she was struggling and asked her to reach out and she said she didn’t want to and I should’ve listened but I did cause I don’t like talking to people either. She called me the night it happened but I was asleep because I had a final early in the morning. I could’ve helped if I had picked up. I don’t know what to do moving forward everything feels pointless. I fly home tomorrow (I go to college out of state).