Limbo over, now separated but in lockdown (part 3)

[Pommy99]

Hey all I wanted to reply to your posts above but have a bit of a drama going on with H today and really need some advice how to handle this.

So I still have really backed off this week again, took kids to H 2 days ago and he commented "wow" how nice I looked etc, he told the kids that evening how nice mum looked. Next day went to pick up D14, later H tells D16 how "hot" i was looking the last 2 days. Also said he missed me. They started talking about studies and D16 said seh wanted to follow a career path as an xxx and mum has a friend who is an xxx and is going to get some advice about it. So H knows that the xxx is someone I was chatting to online and makes a comment about it (D16 had no idea and had assumed it was a female friend)

Today I get a txt:
H: Hiya can I ask you a personal Q
Me: Erm...what is it?
H: You and your xxx friend, how serious are you with him?
Me: I'm not sure why you are asking me that
H: I hadn't been looking elsewhere and I wanted to see if you've moved on now

So I'm in a spin, I feel sick and I dont know what to do - ignore, respond. I dont know if he's checking if I'm Plan B still, or if he wants to start dating and if he knows that I am building friendships, he wont feel guilty about dating himself.