I work in a huge firm in a good position and I have a friend who's a long time buddy but recently he has changed a lot from the time he came to see me at office.He works as a casual laborer since he has no proper formal education and is sometimes frustrated about the situation but I used to calm his nerves by advising. I asked about his change and he told me that he was upset that I'm no match to him when it comes to status etc. but I told him that status is not an issue in friendships.After that he told that particularly he is jealous coz of my white collar position and that I work with pretty girls who are in high status. I got really upset coz he wasn't his real self like those days. He says that even some of his co-workers who are all casual cleaners etc. hate office going guys who have nice aquaintances like girls etc.but I can't understand why this man is taking this so seriously. He and I are members in a kickboxing club too and we used to compete in games where he really fights me and wins in most games but now he easily loses to me coz of his mental problems. What can I do to help him out of this situation as he seems to be having a dangerous grudge against me and some girls who are my colleagues and who usually come to cheer for me at games where I fight against him. I feel he might hurt them in the process. Please tell me what to do to help him.Thanks to you all in advance.