Team player?

I broke it. It was his and I broke it. It wasn't intentional, I apologised straight away, but I'm sorry doesn't fix it. He can't fix it... yet. He can't fix it until December. Three months of making do until he can continue to take more. But obviously, that's not enough. He brakes something of mine, I say, "you didn't mean to" and yes, I get upset, but not at him. This was at me. Maybe it's the difference in upbringing. He's used to having what he wants when he wants. Now he has to wait and he's directing that anger at me. I made a mistake.