Married for Drugs

My cousin has had this boyfriend for a few years now and today we get a call that she's marrying him.
I'm like,"What the f%ck?!"
I met her boyfriend-oops i mean fiance- once.
Here's what I think of him.
Bad boy
Druggie
Drug dealer
Ugly
Filthy
One of those "bad Mexicans"
no offense to Mexicans. A bunch of my best friends are. He's just one those who well read what I think of him. Once again, no offense.
Now here's what my dad thinks, my best friend of a cousin, is getting married for drugs.
I agree, but I don't want to upset her.
But, I hate the path she's on.
Help me.
Another thing.
She's 19.
My parents didn't get married until my dad was 30 and my mom was 25.
I'm not planning on getting married until I'm at least 20.
I have no idea what to do.