8-9 year friendship fading…

So me and my best friend (we are both 20) have been friends for roughly 8/9 years and she was my only friend throughout high school. (There’s no middle school in my country). Even though she was my only friend, I wasn’t hers. Sometimes I would be by myself during lunch or after school because she would be with her other friends and I wouldn’t feel bad because I understood she had to give them attention. However, if I was talking to someone she would say I’m ditching her or barely talking to her. I would go as far as to leave acquaintances during conversations when she’s around to speak to her so she wouldn’t feel bad. Fast forward to 2020 we wouldn’t speak for weeks because we mainly spoke about life and since we were inside doing nothing we had nothing to talk about. She had no issue with not talking to me for weeks. Now I got a boyfriend, I told her and she started to call me and text me often, fine. But low and behold she goes on to say I’m barely talking to her since I got into my relationship. I text her ofc but now she’s dry and our conversations end quickly. I think she’s a good friend to keep, she would be there for me with problems and so would I but why based our friendship on how much we talk? How do I fix this?