It is so different, drug dealers are people too!
My roommate used to move A LOT and he used to have some ground rules to make shit seem less sketchy. If people came to pick up, they'd have to stay for at least an hour or 2, none of this in and out stuff. When you hang out with someone on a very regular basis it's an inevitability that a non-professional relationship would grow. We used to call these situations, and most dealer/dealee relationships "friends of convenience." People who are fun to hang out but you would never go out of your way to chill if it wasn't for the drug dealing. My roommate made people think they were friends, that was basically his job. So just remember, it's all part of their job.
But yea, in general weed dealers are way chill, most of them are stoners who are trying to make a little extra money. But I think if it comes down to the come down, it's all about the money.