Should I change my clarinet or stay with the same one?

-So I have a buffet E11 clarinet I got it on my 6th grade year

I'm going to be a junior in high school

I play in the marching band

So should I change clarinet if so what kind or should I stay with the same one

My clarinet is still working fine most of the timeI think it depends how serious you are about continuing clarinet. You're about to be a junior in high school so that gives you two more years until college, so I would recommend buying a newer, more advanced clarinet only if you plan to further your music in college. If you don't want to study music as at least a minor, then I don't see the point in spending the money and I would just tough it out with your current clarinet for two more years.