Is it ok for your boyfriend to share a pillow with another female at events. Read below

Ok, so I've wanted to know this for a while and want to make sure I'm not crazy. Back in 2014-2015 my boyfriend at the time would go to Jewish conventions and barely text me, but I would find pictures on other girls twitters or event pages where some he's know from childhood would have her head on his should on the bus. Anther post would should him laying on the floor sharing a couch pillow with another female from the convention and other females are around as well. At those conventions at the last day everyone would hook up and he said he wasn't, but he never would text me during those couple of days to a week. We are obviously no longer together, but I've wanted to see what you all thought cause it drove me at shit insane and pissed me off and caused me to question if he cheated on me