After a couple of months of researching and talking I have discovered that my friend is undiagnosed Asperger's with some type of anxiety, depression disorder. I am writing this because he sometimes withdraws and disappears from my life. He never seems to know why and talking to him is sometimes impossible because he misunderstands and takes things so literally, but I'm finding myself getting depressed never knowing if during one of his withdrawing episodes if he will ever come back. I am making this post to ask advice and if anyone knows of any recovery or support groups to help me get over this, to let go and accept that I can't control it and how, if he comes back, can I present him with this or help or do things differently. I love my friend and would do anything for him.