Scared we might be growing apart..

Angel
Well me & my boyfriend live together he's a nurse & I'm going to school while working, we both work in the same nursing home but different hours... Lately I've been working 5am to god knows when or pulling night shift where he works 2-10... So I might get to see him for 5 minutes at work other wise when he gets home I'm asleep I'm gone before he gets up! But when we do see each other we laugh smile have an alright time what really scareds me is he stop wanting sex I know we're work a lot but I would assume he would sill want it he always has... Help please?(:
P.S on the days we might be off together he just wants to hang with his friends & play games...