Ex Calling 🙊🙊

Soooo I have an ex gf who has been hitting me up. About a few months ago she broke up with me because I struggled with confrontations. She was still living with me even after breaking up and 2 months later finally told me she was talking to other ppl (found out they went to on a mini trip together) and she was ready to move out. It has been 2 months since she saw me and/or tried to talk to me (I went to my summer grad school in another state and learned to stop texting). Now that I’m back she has called or text me everyday and has come to my house twice (trade clothes and second time to bring me a slushee she bought me?) what gets weird is this last one she has come she sat on my couch and starting laying under me and tried to look in my shirt playing like she wanted to see my ‘new’ nipple piercing. Now this girl has posted a happy bday Instagram to the girl she is talking to (and deleted it before she thought I saw it) and has said nothing is set in stone to me (unprompted). I don’t know what to do with this and how to respond. While I still have feelings for her, I feel like she is just trying to get a booty call and playing the field with me. Send helpful advice.

Ps we dated for 1 year but been together for 2.