Why did my ex say this?

What does it mean if my ex who I split up with last April says "good night x" & "talk whenever you like x" Why would he want to talk to me & update me on his life?

I wouldn't even know how to start a conversation with him. I can't be natural as we're not really friends. We broke up mutually. I want to know what he wants. I know that he's been single since we broke up & he's stayed in contact.

We slept together a few times after the break, but that was last year. Since then he's been checking up on me. Recently he's been talking to me more, but he's a closed book when it comes to feelings because of personal issues. The last couple of times he mentioned that I can message him whenever I want to.
Why did my ex say this?
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