I proposed to my girlfriend of 10 years yesterday, and she said no because I took too long.

Basically, the title.

I was so excited. I proposed. I handed her the ring. She looked like she was going to cry.

Then she said "Sorry. I don't think we should get married." I asked her why and she said something along the lines of "I'll always be the girl you took a decade to decide if I was wifey material. I don't know how to be happy with that reality"

I really fucked up. Now the woman I love isn't willing to be my wife. I don't know what the fuck to do.