I'm sick of trying to conceive

Mi
After a year and a bit I am utterly sick of ttc. Each month it's the same routine of testing, seeing bfn, getting upset and induring AF. It gets tiring. I'm young, surely I should conceive relatively quickly? I don't have psoc or any other problems that could get in my way.
I've tried taking a break and not stressing over it but it's so bloody important to me... As it is to all of you I'm sure.
Just insure what to do. I can't keep up with the heart break every month. I'm living to ttc and it's slowly tearing me apart. 
I need some advice :'(