You can't choose your Family.
More importantly you can choose who you around.
Evaluate who your friends are. Are they a negative influance?
Evaluate where you meet your friends. Do they expect to hang out at bars?
Evaluate when (time of day) you meet. Do your friends ask to hang out until 2am on a work night?
Make some simple rules to live by.
Go to bed by 11pm from work the next day.
Workout 3-4 times a week.
Eat healthy food.