Why did I fall in love with a woman who never loved me back?

I imagined I would find someone, and fall in love.
But ahh it was only me with all the feelings.
Whereas the girl I loved just was using me up, when I proposed, pulled out " how can you even think, someone like you with someone like me?"
Fucked up my head 😅
I was her only friend in the whole town, everyday, dinner, every walk, every park visit with me.
Daily having an interaction with me.
For 5 months straight.
Now I question myself why I fell in love where she will never?
I knew it from the very beginning but still I had some hope.
Why did I fall in love with a woman who never loved me back?
Post Opinion