she's a brick and I'm drowning slowly

Why do people fall in love? How do people suddenly fall out of love? I had it all. We had it all. We felt so perfect together that is scared me sometimes. We shared everything with one another. I had never felt that way with anyone before. I was completely in love. Probably for the very first time. Now I know what it feels like. I didn't mean to have her have such an impact on my life, but I really did lose myself in her. With her, I felt comfortable, I could be myself and she would welcome it. She was so enamored with me for a time and thought I was just amazing. It was all so spectacular that I thought it was too good to be true. She was always so encouraging, inspiring, and wonderful to me. She was my everything, and all I wanted to do was give her the best and make her happy. After all, that's all she did for me. I had never thought about a future with anyone before, yet being with her gave me the confidence to see marriage, beautiful and intelligent children, and a perfect life together. Despite what has happened, I still think that she is a wonderful, beautiful person, and regardless of what I say or do, I will always love her. I wouldn't act out so much if I didn't care so much. She was everything I could ever have wanted and more. I realize that now. I don't think that I knew what I had or appreciated it enough. We worked so well that I didn't have to worry about it. It seems like all she did was worry and have doubts about us. I don't know why. All I was was kind and generous to her, trying to stay a complete gentleman and be there for her all the time. Obviously she saw great things in me at first, but gradually started to see some things that she did not like about me, which is fine, but knowing that they weren't able to be worked on, leads me to believe that she was literally searching for perfection, and I am sorry but I cannot be that. No one can. I saw great potential this summer, being able to see her at night, going out with all of our friends, spending birthdays together, taking a trip to Kansas City, and even possibly being engaged by the end of it. Instead, we separated. It is the complete opposite of what I expected. I feel so cold and lost now, alone.

She's alone.
And I'm alone.
Now I know it.