is it normal to be scared

well im always here so i know there is noone else cuz we are around each other preaty much all the time as for the pergnant part that mite already be the possiblitie i just dont understand how someone can change there mind over night or pretend to want something then desided he does i mean everything is pointing to the fact that he mite leave wat do i do ride it out see where it takes us he has been moody because he of his roomates but i have asked him to move in with me and he would rather live some where he hates then live with me im sooooo confused