Love. Is it really that serious?

I always wonder what love is. I mean it's obviously many, many things I couldn't even begin to comprehend in my brain but in truth, I think I struggle with it. I don't think I'm loving right.

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Sometimes I feel nothing, I look at someone and nothing activates in my body: no butterflies or truly any other function other than acknowledging they are a being in front of me and that I continue to choose to spend my time around them. But other times it's almost overwhelming, I think the appropriate term is "love surge" but that is a little embarrassing to say.

I see every feature on their face and think wow. how can our evolution create someone so pretty? pretty like the night sky, pretty in a way I could stand on my knees and smile at them because I've been graced by them. To plant loving touches on their body is nothing higher than an honor at that moment. But my body would only generate that when I'm with people I never plan on being with, my brain feels comfortable feeling such a way despite knowing I'll never call them a loving partner.

How can that be? 

My brain might be wired the wrong way. My love could only shine through the ugliest parts of me, displaying and shining a light on how truly vulnerable I am all for them. How on earth is that romantic??