This is a very difficult situation since you're dealing with a real-life friend. Normally, when dealing with annoying people or people who have pissed you off on RS, you can simply put them on your ignore list. How close is this real-life friend of yours? Have you two been friends since you were very little? Unfortunately, the people closest to you can become your worst enemy since they know all your secrets and when given the opportunity, can betray you in a heart beat. Here's my advice: Don't let a game get between your friendship. Well if he was a friend he wouldn't of broke the friendship anyway. My advice is just tell your mum that every time you was on the computer you worked for them "Pixels" and your best friend took it away from you, around 1 year of work taken