Why are men assholes?

This guy i knew since middle school made me break up with my narcissistic ex who made me believe he want it something serious and we were taking things slow but he was just messing with me he didn't want it anything serious he just want it to hook up again and keep messing around with females he said he was no longer interested in having so many women and i open up to him and said the same thing but he was just playing around. And now i have to heal from this too.
Why are men assholes?
Post Opinion