My cousin

My cousin jazz is 13 and she is a pain. she is mean and wont let me touch her stuff how do I reason with her we share a room so we have to find some way to work things out but how

I would advise you to do what she asks, don't touch any of it, but she has to do the same for you. If you absolutely need something, ASK her before you take it.

After a while you can start a list of what you are willing to share, and tell her to put something of hers that she is willing to share...then for those items you don't need to ask first.

If either of you brings back something that has been damaged, or loses something then all bets are off, you have to start from square one, UNLESS you pay for or fix the item to the satisfaction of the other person.

Loaning out belongings requires trust from both sides, and the way to get trust is to respect her wishes, even if they seem silly to you. If you do that you may end up being one of the few people she will loan to.

PS If she loans you something, you cannot loan it again to someone else, even if she knows that person. It's a sure dealbreaker, and one that some adults don't get. If the other person wrecks her stuff, then who is responsible for replacing it- YOU! So it's not worth the trouble.