You've got the Christian talk down. 

Now work on your walk. 

You can't be a light to the world when you are exactly like them. 

There is a difference between

Going out into the world and finding out who you are aside from your parents (which yes, sometimes involves a bit of rebellion) 

And

Being an immature idiot in rebelling just because you think it's fun. 

A BIG difference. 

The people who push you the hardest are the ones that care about you the most.

"What makes marriage worth having is that you, your spouse, and those around you see more of God and his love for us in Jesus. If you’re not experiencing that with your boyfriend, break up with him."