God, I loved him. I could insist I was okay with just being friends, that I'd find someone else and get over him, but I was fooling myself. There was no getting past this. I loved him, and fifty years from now we could be married to other people, never exchanged so much as a kiss, and I'd still looking into his eyes and know he was the one. He'd always be the one.
The narrator expresses deep and enduring love for someone significant in her life, despite trying to convince herself that she can be content as just friends. She acknowledges that she cannot simply move on or find someone else to fill this emotional void. The truth is, her feelings for him are profound and unshakeable.
No matter what happens in the future, even if they marry other people and never share a romantic moment, she believes that her bond with him is unique and irreplaceable. He is the one for her, a truth that will persist throughout her life.