Where there is smoke, there is usually fire.

Meaning .....
If he is selling coke, he is most likely using coke.
Possibly smoking crack..... don't know.

Is that OK with you?
Are you fine with all his lies?
What happens to your life when he goes to jail (for a really long time)?

This is your life too.
You can't control what he does - especially when he lies and does whatever he wants.
Doesn't sound like he has the best track record.

What are you going to do about your life?