Mental illness, paranoia or drug addiction, can you help?
a couple of years ago me and my best friend stopped talking for no apparant reason he just ignored me so i let him get on with it, about a year later i saw him in a club and we got talking again we forgave eachother and got on as normal until 7 or so months ago when he swiched again, he offered to fight me when he was drunk, and the next day kept saying someone was talking about him, nobody was, he was acting very odd, very agressive so i again just let him get on with it, since then we not spoke at all its just gone back to the way it was, he has isolated himself from our group completly i hav noticed (we work at the same place) he puts his wrist up to his nose as if to wipe it, he will do this all the time, if you watch him for 1 minite he will do this like 10 times, i have asked the few people that he still talks to why this is and they say he uses cocaine every so often, but because he constantly wipes his nose, walks and drives so very agressivly, sometimes even punches innanmate objects i am worried that he is a regular user, or if he may hav a mental illness such as skitsophrenia (awful spelling) or obsessive paranoia etc he has always been very sensitive and had random mood swings. even though we dont talk i am still worried about him, what the hell is going on in his head?