How can I convince my mom to get a trampoline?

I don't really have any friends in my neighborhood and all the girls in my neighborhood want a trampoline so I was thinking if I got a tramp they might like me. Plus I want one. I'm the best in my cl at gym and academics, I'm in lots of clubs, I'm really popular in school (not the mean way) I won the spelling bee. I've tried everything! I don't know what more to do!