<human>: I have been very happily married for about 8 years now and I hadn't even thought about my ex almost since the day we broke up 15 years ago. Now all of a sudden, he started liking old fb photos and albums. When he comments, it's mostly about me and how nice I look. He never mentions my husband. He's also messaging me on a daily basis, multiple times a day. My husband thinks it's funny, but also a little concerned. He's not jealous or anything, he's mostly concerned about how I'm feeling. 

I don't want to talk to him at all and any kind of relationship I want to maintain is a superficial one. I've taken myself off of the active chat, but any message he sends me still goes to my inbox and it pops up on my phone.  So far, I'm just trying to be polite and be short with my answers. I try not to engage him into any sort of conversation or insight into my personal life, but it's been going on for a few weeks now on a daily basis! 

I want to reserve my mind for thinking about other things besides my ex and when he's going to pop up on my phone. Is there anything else I can do besides blocking him entirely from my social network? I'm too nice of a person to do that, but I'm sure I will if I need to. I feel that is too drastic and I just cringe about confronting him about it. Is he lonely? Is he just using me as some female interaction? He's a very awkward person and does not take social cues very well.

Can you condense the text into three sentences or less?
<bot>: I'm happily married. Ex boyfriend keeps wanting to chat everyday. I don't want to. How do I nip this?