What a morning. No sleep, just shell shocked and cant think straight. Can anyone help me unravel this please, am I wrong?
I have been seeing a guy since last November. Admittedly casual as were both out of difficult LTRs and both have kids. It was said from the outset that this would never be anything serious. We met every couple of weeks for an evening together, cooking, chilling at his house and sex, cuddles etc. It felt affectionate. Not a relationship but what we had made me smile and I thought it was the same for him. We were due to meet again friday and we were chatting last night so I just asked him, are you seeing anyone else? He said yes 
I was so shocked. Mainly because he had given me no indication and we had been having unprotected sex but also, it just seems so...well, mean.
We never had the exclusive chat but I kinda assumed mutual respect especially as we didnt use condoms but also because he always seemed so kind, so sweet, good morals. Yet he thinks this is ok. We've spent months chatting, sharing life, confiding, all of that.
He should have told me. I said that and he said, no, he didnt think he needed to. Which shows the huge gulf in between what I thought we had and what he views me as (a fuck).
I've ended it and blocked him. Tried to retain some dignity so he doesnt know how upset I am. He said his friends tell him he is "too nice" and that that may have fed into my misguided feelings. Too nice. Almost laughable. The audacity.
I dont know how to feel. Angry, hurt, stupid? A fool. Did I line myself up for this punch in the stomach ? Was I wrong to assume?