How does one endure heartache?

I'm hurting, and I hate feeling this way. My wife left and I think she's serious this time. I know this drama is nothing new, but no matter what, it hurts the same to the person that is presently dealing with it. I think that there is no escaping these feelings except to grieve and go through the hurt, but nontheless it hurts. I want more medication or something, if anyone could hook me up to an I.V. drip of morphine that might help.