I know it is difficult when someone leaves you and accepting it is difficult. You have to be strong. Don't blame anyone for your sadness. Cherish the memories. Never give up for seeking happiness and comfort. Talk to your friends, family. Be around with people, make peace with your mind, look at the blue sky, it helps you de-stress (it does help me). Don't hate anyone as you were always taught to love others. Take care :) Be happy :)