Hi - I haven't read any of your other posts, but if he's texted you since your last date, esp. on Valentine's, he sounds like a nice guy who's interested.
Maybe he just genuinely thinks you're busy with DC at half term? And maybe he's busy too, or thinks you're cooling off as you weren't on form due to zit issues last time you met?
In any case, try not to project all your insecurities onto him. It's very difficult to do but well worth trying! I spent years dating unsuitable men and agonising over guys who in retrospect I had very little in common with or didn't even particularly like. So stupid, but I was just so desperate for a boyfriend and for someone to like me.
So my advice would be to focus on whether you actually really like this man or not - is he worth worrying about? Do you like HIM or just the excitement of seeing someone? Does he make you go weak at the knees, do your personalities match/have lots of common ground, is he honest and up front? If so, I'd just text him and say hi - how was your week?, because once you meet someone like that, life's too short to play games.
But if you're not sure about him yet, I'd bide my time and wait for him to get in touch. Meanwhile, try to focus on the other good things in your life right now - DCs, friends, work, whatever - and to think along the lines of how lucky he is to be seeing someone like you. If you don't think you're a good catch, neither will anyone else - self respect is THE key, definitely.
If he doesn't treat you right, or leaves it too long to get in touch and seems half hearted, get rid the sooner the better and move on. After all, if he really likes you he'll want to see you again and should let you know that very soon.