How can you help being upset while ttc?

I know stress can affect your chances but I don't stress about it. Every time I think about pregnancy I'm happy and I can't wait for it to happen to me. I just get really upset an cry sometimes because I want it so much. And does anyone else have the feeling that it's never going to happen? Like when you see someone that got a bfp you just think "I bet that's never going to happen to me"? I know aslong as I'm trying it will happen some time, but I get so sad sometimes I just can't help it :(