Oh sorry to hear that too.
I was only with my ex for 6 months and i felt awful when it was over. I feel terrible whenever i lose anyone! Especially someone special.
Yeah, it will take time, but you will gradually learn to deal with it, even though it may not seem that way now
Theres always cance you can become close again, who knows you might make a very good relationship together in the future, even if its just as being best friends!
But yeah, you may feel you really needed a partner and that person was HER, but it wasnt meant to be and you will just accept that in time
Being single is less pressure and stress i agree. But i often feel i need someone so its understandable you may have needed someone too.