"He woke up yesterday and just seemed in a strange mood, very quiet. I mentioned that to him and he said he was relaxing."
If he had just woken up, and was relaxing perhaps he was getting himself and thoughts together..just mellowing out..
"Fine. I went quiet too but the atmosphere became unbearable so at 8.30pm I said I was going to watch TV in bed. 30 minutes later he came in, said he was leaving because I was acting weird, packed his stuff and left! I said "aren't you even going to discuss it" as he was packing and he said "I don't do arguments" and left. I haven't contacted him today as I don't know what to say, I'm completely flummoxed by his reaction!"
If you're questioning him and expecting him to just go into full blown conversations, perhaps be engaging and entertaining as soon as he had woken up...perhaps that was the problem.
He may be the type of person to wake up, and just be quiet and relaxing for awhile in the morning...be still in the moment.
Maybe he was enjoying the moment, and things were ruined when you possibly misinterpreted and became angry and assuming because he was quiet. He was quiet..then you went quiet.
Honestly, if this was the case...I understand why he left.
He was mellowing out and just relaxing being quiet. (Nothing strange about waking up in the morning relaxing quietly)
Perhaps he was enjoying himself, and being in your company while doing so.
Perhaps you are the type of person that is uncomfortable in silence, and perhaps relaxing. .perhaps you may not know how to relax, or maybe you're a person who is happy and satisfied with little downtime.
He interpreted your angry silence as perhaps the beginning of a full blown argument, and decided to remove himself before things got out of hand.
He figured you already were silently arguing him.
Also, perhaps you made him feel unwanted and like you weren't enjoying his company.
I personally would be uncomfortable and feel confused if the person I had a good time with the previous day decided to question me about relaxing...and my quiet method of relaxing seemingly offended them. .then instead of them relaxing with me and enjoying our remaining time together ..started a silent argument and didn't seem to be able to relax.
The change would be off putting and would ruin things for me.
It would also seem to me that person is trying to progress the silent argument into a verbal one, that places blame on me.
I would feel like that person is trying to blame me for whatever is causing them to not be able to enjoy themselves further in the visit...I would feel like that person would be playing games by starting arguments trying to get me to engage more verbally because they are uncomfortable in silence. I would be angry, confused, hurt, disappointed, and feel disrespected.
I would have left too.
Op, you may want to rethink this relationship...
Especially, if you're more of an extroverted ambitious and engaging morning person, and perhaps he's not.
Perhaps this would be a deal-breaker for you..as it may drive you mad and become very unsettling for the both of you.