Is AUTHOR wrong in the post ? POST : A coworker (21M) has been friends with my gf (and boss) (36F) but last month I found provocative texts to her from him. Since that time my disgust and hatred for the guy has grown ten fold to the point where I hate seeing his name on her phone or hearing his name in general. 

My gf still wants to be friends with him (I dont think there has been flirting on her side, she just hasn't been shutting him down [this was about 4 weeks ago and I have confronted both her and him about it but it hasn't helped me mentally and now I want to know every convo they have]) and plans were made today to go to the movies with our family and a friend of my gf and this guy. After hearing these plans my mood immediately soured due to the mention of his name. 
AmItA for not wanting my gf to be friends with this guy anymore.