Well lets go at this in a logical way: The meaning of life would be something you can only do or be while alive, something that is impossible to do or be while dead. As such it cannot be anything like love or happyness or any other feeling, as we do not know if a dead person can feel something after death. It also cannot be sex, as someone could have sex with your dead body (sry for the bluntness, bit im trying to proove a point). It could be reproduction, or the continuation of live, but that would be redundant, as it wouldn't be a reason for YOU to live. So the Reason for live can only be something like making your way, living your live the way you want to i guess.
Any thoughts?