HEY~!
I'm also 21! k
I also faced the same situation where some of my old friends got jealous and speak some shitty things behind me.
well? this is MY car and it's ME who pay for all the ****(NOT like my parents pay, I drive)
they are jealous? haha all I have to say is don't care about them if they are so jealous and act like dumbastards, cuz IF they are your friends, they should be happy just the fact their friend got nice ride~