If you wait for other’s prompts, you will waste a good bit of your precious life. Not communicating is not much different than mis-communicating: in fact not communicating is a subset of mis-communication.

A proactive approach to taking ownership of your feelings, your time, … your life is to DO and BE and PLAN TO DO and BE. That doesn’t allow for you to be someone’s casual “option.” Let him know unequivocally that if he’s changes his plans and doesn’t care enough about you and your time to give you plenty of notice (except in the rare instance where uncontrollable events prevent notice) so you can plan your weekend without him, you will begin planning to be on your own or replace him with someone else who will respect you enough to communicate and not passively deprive you of other options. That is a form of theft and indicative of a flawed moral compass, so beware…you’ve been forewarned.