Sometimes it’s just too much to share your life with someone because men feel like they have to sacrifice themselves. Many are just getting by and have mindless jobs that suck their souls. In their free time, they need to have “me time” to recover. Even though he may like you, if sex is all he needs, that may embarrass him. Or maybe he doesn’t feel like it will be a good fit. There are a lot of reasons. It sounds like you work together. Maybe he doesn’t want to sleep where he works, or he likes someone there more. We have this impractical tendency to turn away from people who demonstrate certainty about their compatibility with us. We often like people we can’t have. There are so many variables to attraction and maintenance, and apparently, he does not want to engage, and he plays hard to get. But, getting him doesn’t mean keeping him. I was at a party not too long ago, and one of the older men said to a younger man, who had just gotten a woman pregnant: “You ready for all of this?” The party was full of adults and their children. He was still in school.