Just needed to vent

About two months ago me and my boyfriend of two years split. To dumb it down, I felt that I was the only one putting in effort to the point where I was constantly stressed, and I felt that taking a break was needed. However he completely dismissed my feelings and said we should just break up instead, so we did. However, towards the end of our relationship he befriended a girl from his university. I was never threatened by her but now everything clicks.Shes always all over his social media, and was while we were together. I cant believe he did something so grimy and left me, someone who has taken care of him for the past two years, for some rich bitch who lives off their parents money. I mean that, I always planned, and paid for everything weve ever done and was still fucked over. I know it obviously doesnt matter now but I just needed to vent because I know its ill sound stupid talking about it to my friends.