AITA for breaking up with my girlfriend?

This might be a bit long, but last month I broke up with my girlfriend. She was going through a rough time with her depression and felt very alone. I couldn’t keep worrying about her though, because I started my college courses over the summer. She was very upset when I texted her about it, because I had asked my advisors what I should do about it instead of asking/speaking with her.

A few days later I got to come home for the weekend and ended up reconnecting with another ex girlfriend. I posted a selfie of us on my story thinking nothing of it, but my girlfriend had seen it and gotten very upset, saying that if I just wanted to be with (other ex) I should’ve said that and that she’s happy for me that I realized I wanted to be with her.

A few days later my ex’s mom texted me saying that she was in a mental hospital getting help for her depression. When she came out she texted me and we had a long conversation where she finally apologized about how her depression affected me.

We were talking for awhile almost like we never broke up, but the more we talked the less I wanted to talk. Eventually we stopped talking altogether. I assume because of pics with my ex making her jealous.

I texted her today to ask when she’d be moving onto campus and she was a bit cold and short with her responses. Texted a mutual friend to ask why and apparently it’s because I’m a liar and this is the second time I’ve done this to her, which isn’t fair to say.

Some of our mutuals are on her side but I have a few on my side as well… so AITA for breaking up with my girlfriend?