I'm going to ghost my weed dealer
If you don't want to buy drugs from him anymore, you should tell him how you feel and end your relationship.
Because he hasn't come to my party in 3 weeks.
It sounds like you should avoid contact with him anyway because if he's selling drugs without a license, that's illegal and it could reflect badly on you to be associated with him.
Nah, I'm just kidding. I gave the guy my address then he didn't show up.
You should think about doing to a state run dispensary for your purchases. It's safe and legal and likely sells products that are much higher quality.