One of my favorite quotes about time is by angie cartwright. I am sure you have seen it, but just in case I will post it and give you my thoughts.
" My grieving friend. Sometimes all of the suggestions don't work. Sometimes all we can do is breath. One day at a time, one hour at a time, one minute at a time, one second at a time. But... There is hope. It will come. When, you might ask? It comes one second at a time, one minute at a time, one hour at a time, one day at a time"
For the longest time all I had were those brief moments where I was not feeling like I didn't want to live. Moments where the pain was bearable. And it did get worse before it got better. And then I slowly started crying less. I started have more moments where I was ok than when I was afraid I could not go on. And then I reached a point where it had been a week since I had last cried. I was shocked. Now, although I miss my DH every day, it does not consume me. In fact I am truly happy again. I never thought I would feel truly happy again. Nor did I want to at times.
I think when people tell you it takes time, at least people who have been in a similar situation, they are just trying to let you know that they get how hard it is every single moment, but that with time the moments between the despair do become longer and longer. So just hold on.