Omg I need help plz? Idk wit to doooi?

Ok, so I'm worried dat I mite b prignat... By bf is kinda older than me, an he's married... But I luv him!!!! He sayed he don't want kids, an I don eeder, but I missed my perid... Idk if I can tel him... I'm over 18 tho so it not illegal.