I don't know if I want to do marching band?

I do colorguard, and I'm pretty good at it, and made jv captain. I've done guard since the winter season of my freshman year, and I'm a junior now. I did one season of marching band my sophomore year, and absolutely hated it. I didn't do it this year because I reall wanted to focus on my grades, and my mom was sick, so I wanted to be able to be around and help her.

PROS:

-I get to spend more time with my friends

-consistent exercise

-more extracurricular credits

-less drama

CONS:

-no time

-grades may drop

-I do not have a good relationship with the possible drum major and the possible guard co captain

-I hate marching band in general, and a lot of the people

-it's expensive

-won't be able to join any other clubs or extracurriculars

I really don't want to disappoint my parents or my guard instructor (I don't really care about disappointing the band director because he doesn't respect guard anyway). I know my parents will be ok with whatever I decide, but I'm afraid me leaving band again might ruin my relationship with my guard instructor. And there's a part of me that wants to do it no matter how much I hate it, because the games and competitions are really fun. At the same time, I feel like it's a complete waste, because its not really going to help me in college, and that's my main concern. Please help!!