Concentrate on yourself first gr8. You deserve some time to focus on you, learn what you want and put things into place to achieve them. Right now a relationship is only a distraction from that. You are setting up a new home filled with happiness and minus the fear from before. Make that a wonderful place that you feel at peace in. Grow you strength into being able to say no to people who don't have only the best at heart for you.
Valentines Day is nothing. Just an excuse for cards that go in the bin, flowers that die, and chocolate that gets eaten and is gone. Today is here already and all the spoils of Valentines will be gone soon enough.
What won't be gone is your freedom, your choice and your future. Sure you feel sad, I do too. Not because he was a decent man, but because he was what I knew and going into the unknown is lonely and scary. I wouldn't for a second turn back, but I do feel sad that he couldn't have been a better man for me, and that he felt he had to abuse me to keep me, and that he had no idea how to truly love me and accept me as I was.
Don't mistake that sadness for regret, you should never regret standing up for yourself and your children, for saying "actually, we deserve more than this" and for leaving the violence and abuse behind. He's a damaged man, maybe he can be fixed, but that is no longer your remit, if he wants to change it's up to him, and it's too late to do it to keep you, you've been through more than enough in your time together and you deserve more than that. Keep taking your tiny steps, you are doing so well. Every single one takes you closer to a life you deserve to have, to the freedom you are entitled to.
Be sad, but don't let it swamp you, don't let it take away the clarity of what kind of person he is and was to you. You are strong and you will be so happy very soon.