2 and a half years

After 2 and a half years ttc2 it is not happening. I have PCOS and now type 2 Diabetes too. I am no longer doing ovulation tests and pregnancy tests. Completely lost hope and the longer it goes on the more i want to give up but how? How do you ever let go? How can i just forget about it? I stopped stressing, charting, testing etc as i thought maybe it would just happen because i was relaxed. It has not worked. Any tips on how you take your mind off it? How do you know when it is time to stop?