Since he seems pretty mature and realistic will he care?

My boyfriend is staying the night to night for the first time tonight (just sleeping). I am staying the weekend in my college apt dorm. When I got here I realized I have stains on my sheets from that time of the month that did not come out in the wash. I am trying to wash them again,.but.I.think the stain is set. I have a spare set but they are very cheap and rough and uncomfortable, and have been stored under my bed for a year so they are probably musty and I won't have time to wash them too. And I can't afford.new sheets at the moment. Will he notice or even care about the stains? He isn't shallow at all. And the sheets have been washed, they r straight up stains because the sheets are old.