Is it me or my period?

So my SO went out with his wreck of a friend and has been texting and snapping me. He said he wouldn’t stay out long and has now been out for 4 hours and doesn’t seem to be coming home anytime soon. He seems to be trying to fix said friends life problems and I have told him it is not his responsibility and that I am in the mood for sex tonight, which he is usually begging for, but that doesn’t appear to matter to him right now. I can’t even tell if I’m upset because of my pms or the fact that I’m tired of begin second place when his friend has a problem and wants to go to the bar.