<human>: Summarize the given text in a few sentences.

I feel like maybe I'm overreacting by getting angry at my girlfriend, let me explain the situation.

So back when me and my girlfriend weren't dating yet, we were sort of FWB. My girlfriend was in a project team with me and another project mate[19/20m](Let's call him Alex).  They exchanged a few dirty pictures and some sexting, but that was about it. Eventually we became more serious and didn't want to see other people so the other guy stopped trying.

 

Every now and then Alex starts up a conversation with my girlfriend through a messenger app, and it's always for the same reason. He want's sexual pictures. My girlfriend declines him but keeps talking to him. Alex know's that my girlfriend is in a relationship with me but he keeps on trying.

 

Today he tried again, and I told my girlfriend that I'm done with him trying and trying. Why can't you just tell him to fuck off. She says that 'it doesn't matter, I decline him anyway' and stuff like 'I still kinda want to be his friend' and then tells me that he will probably stop talking to me after this week anyway, so it doesn't matter. They are all happy talking about stuff like our relationship, all the while Alex telling her that he's waiting until we break up. 

She acts like this is all normal, and I got mad and said that I find it stupid that you're even still talking to him, I also said he only wants sexual things, and that if it was another guy, you would find it creepy and disgusting.

Anyway after that I told her I want some time alone to just clear my mind.

Am I overreacting?
<bot>: My girlfriend keeps talking to her past fling that only wants sexual pictures and she declines him, but still keeps on trying to be her friend and I got mad at her for that.