I am so impatient with myself.

I have been feeling so down about the loss of a relationship and person that I thought would be there forever. It's been three and half weeks. And although I feel a lot better  I still have moments of sadness, emptiness, anger, feelings of rejection, betrayal and hopelessness. I know I seem a little melodramatic. It's not like someone died.... But it was pointed out to me that we have to mourn any loss  and I just have to allow myself  feel it, to go through it, and work through it. My response, "how do I work through it?" hahaha! And then I googled how to grieve. hahah! Okay fine! I'll mourn and feel bad and all that, but how do I do it so I can get it over with it, get back to feeling happy again and move on?