Complicated Relationships

I had an online friend for about 6 months that meant the world to me. We used to play video games and talk on the phone everyday. Life got more complicated though the more they went through. They made some mistakes and bad decisions due to their mental health. It ultimately caused them to write me a goodbye message and stop talking. I have accepted the decisions they have made and have let them go. New years comes along and they get removed from a group by one of my other friends. Purely a decision made completely by my other friend. They reached out to me and blamed me for the decision. I haven’t talked to either party in nearly two months. I ended up being a therapist between the two and my one friend who meant the world to me expressed how lonely they were. I asked what they were up to lately and they said after I stopped talking (after their goodbye message) it caused them to work on themselves. But all the changes were materialistic, new car, new house etc. This person has a lot to work on mentally and they seem to only want my company so they don’t have to play video games alone. Why did they start a conversation blaming me for everything if they were just lonely? To me that isn’t a great start into talking to someone again.