Why is my ex doing this if he claims he does not love me anymore and told me to move on?

Anonymous
My ex has borderline personality disorder. He’s told people, so no I’m not just assuming. So because of this , he will say he still loves me one day then the next he doesn’t , then so on. I really don’t care if he doesn’t love me anymore, he changes his mind everyday because of his illness.

But what I really don’t understand is the staring. We unfortunately have to be around each other a lot, and 2 people approached me yesterday telling me when I’m leaving he turns his head in my direction and watches me walk away until you can’t see me anymore , he eyes me when I’m not looking constantly and when he’s caught by someone he looks away , and also does come up to me quite a bit to make conversation.

I was by far his longest girlfriend and although we had good times, it was a relationship full of arguing and his illness made it hell for me.

Why is he doing this?
Why is my ex doing this if he claims he does not love me anymore and told me to move on?
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