Overworked and stressed girlfriend

You two meet in marching band. She's a freshman, and your a sophmore. You both are dating, and you are VERY protective, anyone gets too close, touches her, looks at her wrong, makes her mad or sad, and your involved. She gets overwhelmed easy, and she tends to overwork herself. Lately the days are hot, and she has forgotten water, passed out a few times, and the band director is thinking about kicking her off the team. This causes her to overwork herself even more. She needs you to step in and help her take it slow.