When is it my turn?

So here we are again...getting ready for a FET this upcoming cycle. How do you prepare for the dissapointment? Trying so hard to stay positive, yet prepare yourself for the worst? Will this be our time? So many others have had theirs and don't seem to appreciate it. or realize how lucky they are. I guess these feelings belong to us infertiles. How do you explain to someone who has no idea what some of us go through--physically, emotionally, and financially. You wonder when it will finally be your turn.