Nothin' wrong with gettin' if from a buddy. He could probably hook you up with other connects too, then you might not have to get it from him if you feel uncomfortable.

If he's your buddy then you won't be using him for weed though. If you really don't want it to seem like you're using him, just get your bud when you hang out, like a casual thing. "Oh hey man you got a bag you can sell me while I'm over here? Thanks man, not lets do whatever we were doing before" except you wouldn't say that last part like that. It would just be like if your friend asked you for a drink or something.