Magic, Why can't you let the incident go from Saturday night and just accept the fact that maybe, just maybe he was tired? Why do you tend to take everything he says personally?
Have you ever considered that he's mirroring your actions? Maybe he's trying to let you know in a passive-aggressive way that he doesn't like the fact you don't always respond back to him. Have you considered that this latest incident could be his way of seeing if you are truly playing games or are sincere when you don't respond to his calls.
So, you are frustrated today w/his "I dunno" position. Why today? He's been at this for quite some time and something had to have happened to trigger your frustration today.
What/how are you going to get through today w/o taking your frustration out on your business partner? What's on your agenda for today?
Magic, you have to heal/help yourself before you bring someone else into the mix. You need to learn to love and respect yourself before others will love/respect you.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.