What am I going to do?

My mom got me 4 tickets to see the Jonas Brothers concert on July 9th for me, a friend, and my parents. I told my friend about it, and she said that I owe her for the concert SHE took me to. But, she has the attention span of an apple. She can't watch something for a minute with out getting bored. And plus, she has gotten really bratty since she started hanging out with a girl in our neighborhood. I don't like her anymore. And I wanted to take one of my other friends. And I told her I was going to take her to see Wicked last year, and I took someone else. So she said that I have to take her to something. PLEASE PLEASE HELP ME!!!! I DON"T KNOW WHAT TO DO!!!!! :(