He had his own issues
Understand that sometimes men disappear because of their own stuff. Maybe he just out of a relationship with his ex and is getting back on his feet or love burned him in the past and he can’t face another relationship with anyone right now.
In his last relationship, maybe his wife or partner was controlling and now he just wants to enjoy his freedom. This is the most dangerous guy to lurk with as he can come across as the good guy with potential, but here's the thing. He's not in the right space to give you what you need, and you must let him go if he's not stepping up as the boyfriend you need.
[Photo via @oktvgr]