My (27F) best friend (27F) abandoned me for my ex (27M) and his friends when we broke up. Now that we?re back together, she wants to reconnect.

"Cindy? and I were best friends since we were young (our parents are also close friends). I started dating ?Luke? during uni, naturally, I introduced him to Cindy, and we used to invite her along whenever we hung out with his friends. Two years after graduating, Luke and I broke up.
For the first two weeks, Cindy pretended to be there for me but slowly she started pulling away. Eventually, she just stopped responding to me. She blocked me from her social media but claimed she had deactivated her accounts. A mutual friend of mine and Luke?s eventually told me she was still hanging around with Luke and his friends. I was devastated because I felt like she had abandoned me for people she saw as an ?upgrade?. It also hurt when my mum would mention all of the cool places/events Cindy was going to and asking me why I never wanted to go with her (she made it seem like I stopped talking to her to our parents).
Luke and I reconnected last September and have been dating again since January. We decided to take things slow, so we barely told anyone that we were back together. Last week, Luke was video chatting with some of his friends, Cindy was in the chat. I walked past while he was talking to them and everyone asked if we were back together. We told the truth since it would be weird for me to be staying with him otherwise.
Anyway, a few minutes after the chat Cindy sent me a message saying it was so nice to see me after so long and we should catch up. She also refollowed me on social media again.
I don?t want to make things awkward, but I was really hurt when she abandoned me. It feels like I?m only good enough to be her friend when I?m dating Luke and that sucks.
How do I interact with her without making things awkward for everyone else?
TL;DR ? My best friend ditched me for my ex and his friends after we broke up. Now that my ex and I are dating again she wants to be friends again.


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