Habits have to serve a purpose 

If you want to eat healthy but you don’t, it’s because you aren’t really that concerned about your health, body, etc. And, that’s ok!
If you want to meditate but you don’t, it’s because you don’t really believe that it’s necessary.
If you want to get up early but instead you snooze the alarm, it’s not because you like sleep so much as it’s because you don’t have a reason to get up.
Habits merely require a reason. When you have one they form naturally. When you don’t have a reason, they never fully develop.