SO’s “best friend”

park

Am I in the wrong? I get mad when my SO’s “best friend” (I put this is quotes because he’s talked badly about my SO and I don’t forgive him) tells him about his ex. Every time they hang out, Allan almost ALWAYS tells my man something about his ex(my so’s ex). Whether it be that she has bone cancer (she does not) or showing my SO a picture of her kissing another girl. Am I the only one who finds this disrespectful to my relationship and me as well? I might add that at one point in our relationship Allan told my man that he would take him on a mini vacation and buy him whatever he wanted If he would leave me & made fun of my brother in front of my man 😭 I’m now 10+2 pregnant and it’s really starting to rub me the wrong way.