am I a shitty person?

So a few months ago my friend was in an abusive relationship. Long story short, she came to me for help but practically threw all of my advice in the trash. She did this several times. The dudes in jail now and she wouldn't stop posting about missing him (mind you she would constantly talk about how much she hated him and wanted him gone). I get going through that is hard and it doesn't take a day to get over something like that. But she overall turned to a shitty friend. She used me to get to him when he wasn't in jail, she lied nonstop to me and her family. She dragged me into her lies etc so I just stopped talking to her. Also keep in mind that this friend and I have had a lot of ups and downs and I'm always the one to patch things up. I honestly got tired of being the one who would always fix things so I just sat back. She blamed me for her relationship issues. She blamed me for HER lies. So I just stopped talking. I got tired of her and other people walking all over me. It's been a few months of not talking and out of no where our other friend (who practically supported her staying with the abuser) messaged me and asked why I haven't talked to her. I explained myself. She said that my friend was saying I blocked her on everything and that she couldn't message me if she wanted to. (I have not blocked her, she also knows where I live so she could drive over and talk to me.) Then this guy that my friend had a thing with like a year and a half ago messaged me asking why I hated said friend. I NEVER have said I hated her. I don't hate her. Just haven't talked. I didn't explain myself to the guy because it's not his business. He responded to me with "wow you need help." I messaged my friend (the one I haven't spoken to) saying I have not blocked her. That she has plenty of ways to contact me if she wanted to. She just said she's at work and can't talk. 
Overall I'm just honestly sick of dealing with issues that she starts. It seems like high scho drama and we graduated two years ago. Am I shitty for not wanted to talk to her? I just get so tired of being the one to always hop in and try to save this friendship . It seems so one sided to me. Like I would have my own problems going on and she wouldn't give one flying fuck about it. I've always been there for her but if I'm hurting I get nothing from her. Am I a shitty person..?