measure it?

Can we quantify anything that is not countable? In psychology there is the attempt to make abstract, touchable and therefore measurable. I understand how slipy this territory can be and so, how we should be careful when attempting to understand anything on an emotional level.

Can we measure pain?
Can we measure how much someone has hurt?

I can’t begin to count the tears because of him, the times I felt breathless, the times my heart felt like it was dying on me. I can’t begin to weigh the amount of pain because of him. Can’t recall in a figure number the amount of sleepless nights. Can’t quantify the times I humiliated myself.
Although, I can count the years I have loved someone that said not to love me back.

In order to measure something you need to know exactly what it is, only then can you attempt to understand it and draw any type of conclusion. Is pain something that can be understood? How can it be defined? Surely we can see its effects on the brain? The receptor of everything, every feeling and every idea.

Is there a difference between the pain of loving and not being loved back compared to the pain of not having found someone new to love?

When I hit my head against the wall, when I smash my fist into solid brick, when I cut my skin, when I drug my body nothing compares to the pain my brain imposes on me when I think we not together. When I recall the words I don’t love you. When I remember you have been able to move on and be in love with someone else.

But hurt can’t be measured because there is no device that can quantify it. Isn't it?