yayyy drama

I have best friend that i have known for 7 years now. We went through a lot together. And I have a rlly close friend that I've known for 3 years. They don't like each other. Whenever I meet up with one friend the other one is getting mad and whenever I meet up with the other one the other friend gets mad. When I post stories with one of them the other one will reply being either sad or angry. Both of them have issues with their mental health so I feel even worse when they get sad because of me. But I have Issues with my mental health too. And I need time for myself. But it's almost impossible because when I was in a call with one of them or met up with one of them I have to do the same thing with the other one. If I don't do this there's gonna be a fight. I can't explain it but I kinda wanna be alone at the time. What should I do now?