If he is divorced with grown children, he may not be interested in getting married right away. Also, three dates is not keeping some big secret from his children who are grown. If you are trying to create a future you can be setting yourself up for disappointment in that you may be trying to put him into a role of "your idea of" that he isn't going to fit into. Don't think you need to suddenly give someone else your heart either. It's much healthier to see who this man is. If you have enjoyed the three dates you have had with this man, then see what develops.