I would worry
I know everybody here is trying to be tough about addicts in their life. I have not been exactly in all the people's shoes and I do not blame them. But I think I can understand how you must feel. I would worry crazy about him. I would be scared that maybe he is somewhere dead or dying. I would probably be looking for him if I knew how and where.
Which is not supposed to be the best advise. Just that the 'not knowing' must be very hard on you and it is even difficult imaginning how you must nowfeel.
God or HP be with you. Sending you love, Aura.