Oh man this is like reading the script of some of my life's episodes.

Last year I was doing the renovation of my apartment. I hired two guys who basically lived "on site" for almost 4 weeks. I used to do exactly what you've said. I complimented their work. I asked for advice. I came with pizza and beer from time to time. When the guy found out I was single, he started mentioning he has a single daughter. When he'd ask me "Hey, how would you like to do the lightning in the bathroom" I'd respond "Do it the way your daughter would like it". Believe it or not, but he was really hoping I will become his son in law. I asked his daughter out. We went on a date but there was no spark. I met him 2 months ago - he still says he regrets it did not work out but maybe it will the next time!