I agree with Don. A guy you just had drinks with once is on very thin ice when it comes to Valentine's Day. I don't think there is an appropriate message that wouldn't seem presumptuous or needy in certain lights; frankly if a guy I met once came on strong with the Valentine's day stuff I'd run the other way, so I'd give him a pass on this.
Cute stuff you did with your daughter, I'm sorry she's so affected by your angry ex. Do you think it's more useful to speak to him, or to OWW (gag)?