Tomorrow is moving day

Tomorrow is moving day. I've rented a storage & a U-Haul truck.  My son-in-law and a couple of friends are going over with me to get my stuff & take it to storage.
I was able to pack most of it on Tuesday  & Wednesday, but even though he had agreed that I could come pack on Thursday, he changed his mind.  I sent him a text this morning telling him I needed to come get my insurance card - no response - about 2 hours later I went over there.  I rang the doorbell & he answered. "What are you doing here?" I said I need to get my insurance card from the office & that I had texted him. He said "Yes, but I didn't say it was okay."  I said that he was all over the place, one minute it was that I could come get stuff whenever I needed to & that I could leave my furniture there until I got an apartment & the next minute it was "no, you can't come today & get your crap out before I throw it away." I said this was my home too & all my stuff is here. It's not right for you to deny me access to my stuff.  No response.
He then asked what time I would be there on Saturday to load up. I said "I'm waiting for you to tell me what time is okay, because you obviously need to be in control of this." He said 10:00, so it's at 10:00.  He then asked me to hurry up & get what I needed. I did & I left.
I was pissy with him & I know I shouldn't have been, but really, he is such a dick. 
Not looking forward to tomorrow, but so looking forward to tomorrow being over. Once I do, I will have met one of my goals and can move that slider to 100%. 
Why am I so sad?