How to balance everything in my life?

alright, well first off, I’ll be 16 in a month. and my parents are making me get a job, probably at just a fast food place. which I really dont want, but I have to. but, I just hate the way my life is moving right now, its way too fast. im still just a kid, hanging out with friends, and my girlfriend, trying to make my life work, but everytime I try something gets in the way. I was majorly dedicated to sports for a long time, about 13 years. then I dislocated my knee for the second time and tore my ACL, and I need surgery now…so no sports, no running, no jogging, no skating, no anything. it is really hard for me to cope with it. and now, im starting a band. my injury has given me more time to work on my music. only problem, half the band membors in my band live about an hour away, makes things hard. on top of that, I need to make time for my girlfirend, who lives half an hour away from me, so I cant see her everyday, the only chance I get to see her is the weekends, or holidays. we dont go to the same school, so I dont see her at all on week days. but since my band mates live so far away, the only chance for a practice would be on weekends. which sucks, I want to spend time with my girlfriend, but I want to make music one of my top priorites…and I have no clue how to tell that to my girlfriend without upsetting her, and I would understand if she did. I’ve been with her for about 2 years, so if out of no where she said she wouldnt get to see me a lot because she’s deticating time to something else, it would suck. and soon, im going to need to balance a job, with my music, with my girlfriend, and with my friends. I have no clue what to do, its all so hard, and its coming at me way to fast. I have one month to get this all figured out, and its so hard. way to hard for me to handle, and I want to talk about this to my girlfriend, but I dont want to worry her. she see’s me as this great perfect guy, and if im falling this hard with my own life, I dont want to let her down. I dont want to let my parents down. and I just dont want to let myself down…and no matter what I do, I’ll be letting somebody down, and its way too much for me to take right now…I dont know what im going to do. sorry its so long, thank you if you read it all, and thank you so much if you can take time out of your day to try to help me