Friend f (35) is running away from me m (36) after we were getting closer. How can I healthy either keep the friendship (ideal) or move on?

My friend all of sudden pulled away from me just as our friendship was getting closer. It's odd because she is fine hanging out with me post a dance class we do but not outside. Even though the things we were doing were basically the same. I don't want to force her to be my friend but I also don't want to lose the friendship if I can. And she hasn't given me a reason other than it doesn't meet her authentic self to be my friend whatever that means. I know she's gone through lots of trauma like last year she was in a controlling relationship. But she's someone I really want in my life if it can work. Any advice on how to proceed would be appreciated 👍🏻

Tldr female friend suddenly breaks off friendship and pulls away after our friendship was getting closer. And can't give me a reason or be willing to work through whatever is bothering her.