What should I do about my unfair friend?

[nomuz]

Background story; Question at the end.
So before homeroom I had a friend who literally texted me before the school open to see if I'm going to school so I can meet up with her and hang out with her before morning. Literally every morning she texted me. She would get mad at me if I had club things to do in the morning. So because of her I did not hang out with my other friends in the morning hence just sticking with her in the morning. (Even after I started hanging out with her every morning she still texted me making sure I was coming to school.) So a couple of months ago she started becoming distant and as I'm talking she would be on twitter... Then occasionally a friend from her homeroom would come over and they would talk I'd talk occasionally in the conversation but a lot of time they would talk about stuff I'm not involved in so I can't contribute to the conversation. Literally for three days she said she "had" to do something in her homeroom class so she couldn't meet up. The first two days she texted me it then the third day (today) she didn't even text me at all. The past days I've been hanging out with my other friend group which I used to hang out with but there are people who I don't know in it now so it's awkward and a few moments I would be awkwardly sitting or standing (depending if they were sitting or standing) not talking to anyone cause they're talking to each other about topics I don't even know. I feel like my unfair friend who made me segregate from my old friends in the morning will be "busy" in homeroom again from now on... So what should I do? It's awkward with my other friend group and my unfair friend is most likely just going to hang out with her friend from homeroom in their classroom. So I have no place I fit in anymore. It's the middle of the year so everyone already has their place.

[Wascally Wabbit]

You sit down with her in private and talk it out. Then you decide if this is a frienship you want to keep or end.