Oh no what's wrong with my Aqua?

I am seeing something a bit different here - I do acknowledge that I do not have ALL the facts so please do take this into consideration.
You called him while on your way to meet other people - there is nothing wrong with doing this IF you stated to him that you were thinking of him and wanted to say hi however you only had a few moments to talk and would call him later if that worked.
"I couldnt engage fully in convo bc I was heading to a restaurant to meet some friends, and I just told him I was going to a restaurant to meet a guy friend and some girls but it was work related." ------> seems to me that you were pretty clear to him. My guess that the reason he became quiet was to make you feel guilty - it worked didn't it? My question to you would be - why on earth would you need to feel guilty about stating what you were doing? there is NO reason. No one can make you take that "guilt trip" unless you choose to take it. You did nothing wrong - you were honest and upfront. He is a big boy and if his feelings were hurt then this is something HE needs to work on and figure out.
"Suddenly he was quiet, and I said "Hello are you there?" He said "ya i 'll just talk to you later" in a\ gruf\f\ tone. I said I want to hea\r a\bout your week\, he said "no later". I then said I will call you after my dinner,but he replied "NO I will call you" and he said bye a little too hastily!" ------------> his response to you is a form of manipulation - trying to make you feel bad for what you did - in a round about way he is letting you know that HE is more important than you yourself are and if you begin to fall into his moods directing your path....you will loose yourself and fall into the trap of ......hmmmmm what shall I do? will this upset him? can I say this or will he be upset? soon, you will be walking on egg shells and you will wonder at what moment did your self esteem go *poof*
See how you are already experiencing CONFUSION?
Your best bet is to truly know what you like/do not like, what feels good/bad and keep trusting your incredible instincts - DO NOT ALTER YOURSELF DUE TO A MAN'S REACTION OF WHO YOU ARE.
*if I have completely misread this post - please do accept my apologies