I am sorry, that has to hurt. I think the trend I see with H users is that their partners always say how they disappear. I would guess he is using. I think you should look at the big picture. Do you want a life with an addict who lies to you and disappears?
I would say to go to NarAnon meetings so you have face to face support. Maintain no contact with him. Do nice things for yourself and stay busy. So sorry.
XXX