Looks like the OP learned an important life lesson. When you have cool stuff, you'll always have "friends" who want to share your cool stuff with you. But a guy who doesn't have money to buy his own also can't afford to replace yours, and likely doesn't care if he wrecks yours. I remember being the wrecker at around 13 years old. A guy I knew a little bit had a stunt bike back around the time Tony Hawk was famous the first time, and I wanted to try walking it on one wheel like he did. The kid had his seat adjusted so high it wasn't supported by the frame, and when I wrecked the bike the second time it broke off. I didn't care that it happened, and didn't offer to replace it because I was a 13 year old kid with no sense. There is nothing wrong with saying "No" when you have something valuable that requires skill to use. Anyone who can't understand that is not really your friend.