I had a similar friend. There was the possessiveness and excessive concern. I would set boundaries, it would scare her, and she’d break them. We deserve to have friends that respect our boundaries. I actually think the “excessive concern” they have is not for our well being but actually a concern to get reassurance that they have their foot in the relationship still. So I find it not caring at all. I ended up having to state that I was pretty unhappy with things and I just stopped communication. She did initially make attempts to reach out, apologized, then slowly faded in the attempts, but I had to remain consistent because it was like she was looking to open up that door of no boundaries again.