How do you cope? I have been ttc for over a year and am still trying!?

I am trying so hard to keep positive, I have had all my blood tests which are normal and am now waiting for HSG. I have just taken yet another negative pregnancy test (Shares in Clear Blue please!) and I am so disappointed and really very sad. Please help.... how do you deal with this month after month? I am starting to get a bit down about it.