It will hurt. It will take time. It will require willpower. You will need to make healthy decisions. It requires sacrifice. You will need to push your body to its max. There will be temptation. But, I promise you, when you reach your goal, it's worth it.
Giving up on your goal because of one setback is like slashing your other three tires because you got a flat. So giving up on my goals for succeeding school and graduating will not be stopped by one setback.