Scared....

My bf is amazing but right now as of yesterday I feel like all he wants is sex (we always do it at least 2 times a day)bc that's how all his friends act and it sucks bc I dont want to believe he is that way he seems to really really care about me and maybe I'm just emotional bc I'm on my period but idk how to bring it up or say something we've never argued about anything and I dont wanna cause a arguement I'm at a hard spot and idk what to do please help