My adopted son is having some identity issues and I'm very concerned.

My son is adopted. He is 21 years old and in college. We adopted him when he was 3. Parents abandoned him at birth. We're American, but two decades ago, my husband and I (we met on the job) used to work for a gender empowerment NGO in Zambia, Africa. Our son was born in Zambia, to Zambian bio parents.We fell in love with him the moment we lay eyes on him, and began adoption proceedings. When it all worked out (was one heck of a process) we came to America. Our son was 3 years old when we adopted him. His entire life has been here, in America.We realized that as a he grew, he would have questions and queries about where he comes from. We addressed what we could, and we also visited Zambia as a family on vacation on three occasions during his childhood. He enjoyed it.As a kid our son never really had any identity issues. He was always happy, always smiling. A couple of his high school teachers actually cried when he graduated, because they would miss his jovial presence.Things changed when he went to college. He is much more introverted these days. I was talking to him on the phone yesterday, and he told me that he feels like his entire childhood was a bubble - one that burst once he left home.The identity issues stem from cultural and racial aspects - observations people around him in college have made, things that didn't happen in our area when he was a child. Last year, he was an exchange student at the University of Cape Town, South Africa, and he said at times, it could be hell due to his background.My husband and I got him a therapist so that he can work through some of these feelings. But I'm constantly worrying. I hate that he lives so far away - I kinda feel toothless in a way. I've been replaying his childhood and thinking of ways my husband and I could've done something that could have helped him deal with the challenges he is facing now. He broke up with his girlfriend cause of these issues, and prior getting him a therapist, he told me that one night he drank a bottle of Brandy on his own (we're talking about someone who rarely drinks at all).I know I can't control what others do or say, and how my son reacts to it, but I'll admit I've been having sleepless nights worrying about him. I know there's no quick fix for something as complex as this, but would like some input. via /r/Parenting https://ift.tt/2qMTIrW