Why Does He Still Want to Be Friends?

My more recent on-off hookup (19M) just messaged me last night after ghosting me for three weeks saying that he's now in a relationship. He says we can't hangout anymore but still wants to be friends. I'm just confused on what's even the point of him still wanting to be friends when he hasn't even been talking to me...

I have a lot of appreciation for him even though I'm annoyed with his behavior, so I called him 'bestie' and agreed because I don't want to lose the connection.
Why Does He Still Want to Be Friends?
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