why cant it be me!

I don't know why I feel like this is nothing but a heartache for me, I went to the doctor and they said everything was fine with ttc. a lot of ppl say we are trying to hard and it will happen once we stop. Question is how do you stop trying? I want it so bad and it seems like everyone around me is pregnant ad I'm over here thinking in my head why not me! its an emotional rollarcoaster and I have no where to turn. I cry all the time b.c i want to have that experiance, to be able to tell my spouse we are having a baby, to feel the baby & hear the heartbeat.. it just seems like it will never happen. its to the point now where I feel numb in general. I'm even having dreams where I am pregnant and just wake up crying because I know its not true. I guess I'm just thinking it will never happen.