Is he or isn't he into a long term relationship with me?

I’ve been dating a man for about 3 1/2 months. He has been separated for a year from his wife. He’s going through a divorce and the divorce will be final in January. He has no kids. We get a long very well and I am developing strong feelings for him. My concern is that he seems so into me one day, and then another day he seems closed off. He says he is ready to be with one woman, that he doesn’t want to be single forever, and still believes in marriage and wants kids. He even makes comments to me about us having kids and plans trips with me in advance. However over the last week he has been pulling back. We aren’t in an exclusive relationship because he says he doesn’t want to rush into anything but at the same time I’ve been giving him my all and not really dating anyone else. Should I pull back and start dating other men?