It won't hurt forever. You will find someone else. You will get over this. Someday you will be able to look back and be glad you made it through. Just not now. I never know how long one of these things will last. Thich Nhat Hanh said that Hope is a "bad" thing (I am sure he used more elegant language) because it makes it impossible to live in the now.
I don't know what the point of feelings is. That is a philosophical question beyond my abilities to understand. What I have discovered though is that feelings do not have to control my life. Feelings, in and of themselves, are sort of meaningless. Yes, we have them. Yes they can have humongous impact on our lives. But what are they really? When feelings become overwhelming, they actually impair our abilities to live.
For me, when feelings become overwhelming, it is important for me to rest and to take care of myself, as if I were my own friend. It's like the flu. Feels awful but you do get over it.
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The river is the melody
And sky is the refrain - Gordon Lightfoot