<human>: Can you provide a brief overview of the text?

Didn't know whether to post on here or off my chest. 

This girl has been giving us issues since we started dating, constantly obsessing over him and telling people that they're still in love with each other, even though he thinks she's gross. But after about 2 years of ignoring her, he added her on facebook. When I asked him to delete her, he did, only to add her again. He's done this about 5 times now, and I feel uncomfortable with him welcoming her into our lives like that, but even more uncomfortable that he's only deleting her temporarily. I know it's a minuscule problem, I iust need a minuscule solution.
<bot>: bf adds ex on Facebook, deletes her when I ask but readds her later. What do I do?