I'm scared of loosing the most important people in my life

I'm scared of whats happening in my life rn. I'm friends with two girls.I love them and I can't imagine living without them. But they hate each other. whenever I'm with one of them she talks bad abt the other one. One of them has been my best friend for 7 years. The other one is a really close friend that has helped me through a lot recently.Whenever I'm with one of them I'm scared that the other one will get jealous. It's just so exhausting. I have had a lot of fights with the one i have been friends with for longer because she is jealous that I'm spending too much time with the other one. I've talked to her very often abt this but it isn't getting any better. I juste don't want to loose her. We've been friend for forever. But I also don't want to loose the other one. She is alsovery important to me. What should I do?