Different circumstances to yours as I left my emotionally abusive ex. I was petrified of getting close to anyone as the trauma of deciding to leave and then the fall out afterwards put me off men for life.
A few months after I left with a sky high sex drive (I had a poor sex drive with ex, suprise suprise) my lovely friend set me up with a mutual friend of hers (I knew him but vaguely, always felt some chemistry between us on the times I had met him but was in a relationship and actually stayed out of his way). She literally said "what you need is Mr XXX in your life). Total free spirit, never settled down, she had had a very biref thing with him 20 years ago an vouched for him the the bedroom department.
I thougth f**k it why not. Wasn't going to turin into anything, he has no kids, I have two. He has a very free lifestyle int he career he has etc. We saw each other regularly as FWB, then decided as it seemed both of us were getting feelings to stop seeing each other. I was upset for a day, then got myself on tinder and had 6 months of a lot of fun meeting new people etc.
Then he contacted me again, and because the sex was always amazing, we started seeing each other again. All this time I kept my personal life away from his, and vice versa. We just really knew each other in a physical sense. Then in Sept, he changed, he started gently and silently pushing forward and we are now in a full blown committed relatioship.
He is the most patient person I know, when we were in the FWB set up, I thought he was holding back. It was me all along really. I didnt want anything that could cause me pain. He is kind, calm, gentle but very manly (his forearms are like trees), talented, smart, affecionate and the sex remains amazing (if not better). We have a long way to go, I have only told him I love him in a round about way and vice versa, but he gets on great with my kids (he is a masive kid himself, but he is just present, not trying to parent them in anyway).
He has helped me heal, and I think I have given him more than he could ever imagie in a relationship. We both live our own lives but he champions my goals and I do his. I am not 100% sure if I could live with him full time as he can be terribly disorganised and messy and I can be a neat freak, but we are getting there. He stays when the kids arent here.
My point is, even when it was staring me in the face I couldn't see it would work out to be a relationship, I always said was just for fun, but its turned into a lovely thing, with no drama, no arguements and just mutual respect for each other. He is amazing, I am very lucky, he tells me he feels the same. :) I have no expectations of it lasting forever, each day is a bonus and if things start to go wrong then so be it.