Ugh.. DS's dad is blah vent

Don't quote please. I'm going to delete.
Ever since he found out my ex and I broke up he's been telling me he misses me and wants to hang out.

I finally said yeah sure next friday i'll be in town i can stop by and he's like call my mum's phone it will be nice to wake up to your voice again.

o_O wtf.. we have been broken up for like a year now and he has all ready shown me he chooses partying, alcohol, and other women over me and his son so idk why he even thinks I'd consider going back to him.

I like hanging out, he's a nice guy and all. I just won't make that mistake again.

How should I approach this?

I've tried being subtle about it but he hasn't taken the hint.

And I think getting engaged (when i did to my ex) and pregnant would be a sign i moved on.