It’s also probably disappointing because you’ve invested a year with this man, and things aren’t going the way you thought they would. Remember that if this isn’t Mr. Right, then a year is a short time compared to a decade of being with the wrong guy. Time is relative.
Most importantly is that you be honest with yourself. Is this someone you want to pursue a future with? If you’re not sure, then have a talk with him, and find out what’s going on. If he tells you, then you’ll have a better idea of his life and you’ll either feel closer to him for having talked, or more disappointed because he’s just not that into you. If he doesn’t tell you what’s going on, or denies something’s going on, then you’ve got the same options. You can believe that he’s disappointing as a partner or that he’s just not that into you and is being deceptive about something he doesn’t want you to know about.