sos i don't know what to do

my boyfriend is becoming more distant sexually the last 2 days, we have been alone and every time i go to make a move he will quickly get up and suggest we go outside or do something else, i'm getting concerned that it's to do with me, we are normally a very sexually active couple that can't get enough of each other. 
i've only just told him that i wouldn't be shaving for a week or so as i'm getting a wax and am scared that it's turned him off me sexually, mind u i've only gone about 3-4 days without shaving so it's really not that bad and he for starters hardly even shaves himself, what do i do and how do i go about this without seeming crazy