Staying "on track" is very important to you, and you will find that when you are physically active on a regular basis there is not much stress in your life. You need to take your physical well-being quite seriously or your energy will run amuck. Broaden your awareness of what healthy means to you by talking with your friends about fitness. See what they do to enhance their wellbeing. Be open to trying new things. Maybe you will go to the gym or a yoga class together and find it is more fun for everybody.