Can someone be a recreational user? I've met one in my life. *ONE*. He could take coke or not (not crack, but coke). If he didn't have the cash, then he didn't do it. And even if he had the cash, he didn't necessarily want to do it anyway.
Speaking for myself, I personally would not date anyone - or even be associated with anyone - who did anything more than have the occasional glass of wine. Anything more than that means to me big problems.
The other issue is doing coke is a criminal act. So, if you're around someone doing it, you're gonna go down, too.
I'm sorry you're having to go through this, but you have come to a wonderful site with many, many supportive and knowledgeable folk.