How do you fix a broken heart?

I lost someone very dear to me. After 5 years and many many memories, they left me. I cant stop hurting, not even for a moment. I don’t know what to do with myself and am heavily contemplating just giving up entirely. I’m not one for such actions, and I know I won’t in the end; but right now feel as if I can’t go on. To have your heart ripped from your chest, only to be given slight glimmer of hope, then to have even that taken from you.

I’m not a strong person, and my friends arn’t very good. I’m truly alone right now. What do I do?