Yo, Fink, my nigga. First of all, I liked that name, change it back. Second of all, you gotta decide whats more important: getting laid or losing your dealer and possibly getting the shit beat out of you and/or raped by a group of guys in a dark alley late at night because of some (most likely) moderate at best T&A?
Now, I think what we should first do is establish an answer to the most important question that you or anyone reading that post should ask themselves. "How hot is she?" If she is a 8, 9 or 10: go for it. Its totally worth it. Even if she is a 7 but a freak in the sheets, still go for it. I mean, its not like you're going to be boning J-Lo or anything like that, but it could be one of the best lays in your life and you will get a good story out of it to tell your grandchildren later on in life when you are old and don't give a fuck what anyone thinks about you or what you say because, God damn it all anyway, you've been on this earth for 75 years and you want people to know that at some point and time you weren't old and lazy you were the fucking man getting it when and how you wanted and you didn't take shit from anyone, like an toilet thats out of order.
However, if she is a lower than a seven, regardless of the situation of her talent on the mattress, pull a Nancy Regan and just say no. You can still hang out, get drunk/high at parties with her maybe drunk make out every once in a while or hell even a hand job when nobody is looking. But don't go all the way. Maybe its because I'm pretty nonchalant about just about everything, but a hand job isn't really that much of a violation. I mean, in all honesty you could do it yourself, she was just saving you fatigue and as long as she doesn't swallow or anything its no harm no foul, she just has a sore arm. Anyway, yeah bro. Wait for her to break up with your dealer if you want it that bad. They probably will. Drug dealers usually make stupid mistakes and girls find out and then they breakup and remember that rebound sex is incredible. Just like make up sex but without the repercussions of getting back together and fighting all over again. Don't go after her immediately though, thats just dumb. Wait at least three weeks, if you don't think thats good enough wait for about 2 months. Thats something like 61 days unless they break up in February. Plenty of time for her to decide whether or not she wants to go back to him and same deal for your dealer.
But if these guys that your dealer hangs out with are "straight-outta-Compton" thugs then I would probably just let it go altogether. Humphrey Bogart once said, "I'm not sticking my neck out for nobody" and I think he was onto something. Even though he went back on his word and did stick his neck out for somebody (a girl in fact so I guess this kind of has relevance) but I think that was more for plot and having dynamic characters and discussing the human condition or some shit. I'm not a film major. I don't think that getting punched and kicked repeatedly for fooling around with your dealers chick is worth it. Marcellus Wallace doesn't look like a bitch and neither is he probably.