My ex was a pretty quiet person, and everyone thought he was so nice and kind and gentle. Really he would say a lot of judgemental things behind peoples backs and was actually quite an asshole, despite having good manners and was generally nice and friendly to anyone he met. Anyway, we had definitely been having problems already, but I was putting in a great effort to make it work. One day, despite him being quite a closed off person who likes to be in smaller groups, he told me to invite my friends over to his apartment and we'll have a bbq and beers. Fantastic! I get to his apartment an hour or so early, with one or two of my close friends, to start cooking and prepare everything. I noticed he's cleaned the place up well, and even printed photos and put them into the picture frames I bought him for Christmas a few months ago. Awww. There's pics of his family and friends, one of me even, on one wall of the living room. Then I notice, on another wall of the room, there's another photo, by itself, considerably bigger and more noticeable. Of his ex girlfriend. Which he put there, the night he invited all of my friends over. I tried to keep my calm for the majority of the night, and my friends were trying to tell me it wasn't a big deal (they later told this was only to calm me down as to not cause a scene at the party, and knew he had done a really weird shitty thing). But regardless to say, after he ignored me the whole night, and after knocking a few beers back, I told him he could go fuck himself and walked out of there. He tried to follow me, and I mentioned the photo to him.

He literally, could not for the life of him, understand why I was upset.