Im confused about my sister inlaw

My SIL fell out a few years ago because I always thought that she was very insecure, competitive and mean and treated me like I had done something to her. I killed her with kindness for the sake of the family. I couldn't be fake anymore and told her how i felt. She thought we were friends but I didnt. She stopped speaking to me which I thought was odd because I was only telling her how I felt. She remained friends with me on social media but didnt interact. She then said she thought that I would get the hint when I confronted her about disrespecting me and playing it off as if she had done nothing. I told her that i dont hint, I just delete which is what I did. She always comes off so passive aggressive and I hate it. I have always felt like one minute she is nice, the next she is mean or throwing shade and tries to make me feel insecure but doesnt own it. Her actions dont agree that with what she says. I was the bigger person for the sake of the family, we made up and I made sure to clarify where we stood so that we dont end up in the same place. She said that she doesnt want to force friendship, if it happens it happens. I felt the same, I was willing to start fresh. I refriended her on fb, she invited me to an event and i went and she came to my event. I thought that we were cool. The thing is on social media. She barely interacts or like my posts. She likes everyone elses stuff and interacts. Im at the point to where I feel like it is what it is but i regret refriending her. I always feel like she likes to keep me wondering why I stand with her which is why I wanted to clarify that with her before moving forward. Ive come to the conclusion that I dont want to entertain her and her mixed messages anymore. Ive totally stopped liking her post and Ive unfollowed her. Ive decided to be cordial in person and follow her lead on how we engage when we are around one another. Should I unfriend her, restrict my page or just let it be? A part of me feels like I have to set some boundaries with her especially since she told me before that I should have gotten the hint when she stopped interacting with me on social media. Why would this time be different? I just wish that she would straight up. If she doesnt like me or still mad, she could have ignored my request and I would have been fine with that. This sounds silly but I cant carry on friendships in real life or on social media with wishy washy people that I dont trust and if she doesnt want to engage at all, why are we friends on social media???