I don't know what to do about my mom anymore

I don't know what to do about my mom anymore she keeps being mad at me and making snarky comments. I'm really trying with her and I don't really know how to explain it but she blamed me for her past relationship and her and her ex have been broken up for a while but it's still somehow my fault for the way he treated her, she likes to blame a lot on me and I can never do anything right or make her happy and it's making me feel really suicidal I'm not sure if maybe we just shouldn't talk for a while cause everytime we do she says something snarky to me or it's a fight.