I definitely had a moment or two like that... complete eye-openers.
At the time, my fiancee and I were just friends; *new* friends, at that. I had known him for maybe a month or two, and I had no idea that he even had romantic interest in me.
As time wore on, I started seeing the hints, but I shrugged it off as a small crush of his, and continued on my way. He was my funny, charming friend that made me smile; nothing more.
I liked someone else at the time, (ironically, someone else that I met at the same time as my Love), and was planning to ask him out. So I'd gotten advice from my good "friend", and he did help me out, even though he did speak strangely of it. I had a feeling he was hiding something, but had no idea what it was.
The time came to pass, and I did openly confess my romantic interest in this other person, to a few friends and him, of course. But instead of getting a warm reception and happiness from everyone, I had a strange mix of things...
From my Love and a mutual friend of ours, I kept getting a strange, negative feeling. They were distant, and for a long time this 'friend' of mine said not a word to me. A few very long days (we normally spoke online each afternoon) passed, and I began to wonder what had happened.
The next time I spoke with him, he was a very different person. At first I wondered if he were drunk, or out of sorts, since he seemed quite... unstable. He told me that he'd been shaking, visibly upset and ill to his stomach for several hours; and that he considered himself a failure and was consumed with rage at that. He told me he'd never felt anything so intense and upsetting, in fact. He refused to tell me what all this fuss was about, and because he'd helped me with my latest love event, I didn't link those two elements together.
However, later on that night he was very calm, and somehow spilled everything. He told me that he'd loved me for the past few weeks, and couldn't have imagined how he'd love anyone so much as he loved me. He even promised eternal love to me (which overwhelmed me at the time o_o... but considering now that he's my fiancee, I just smile in amusement), and said he couldn't be happy without me, and that he was so angry at himself for helping me pursue someone else.
So after that strange breakdown, a few weeks went by and his love for me did not waver. He'd continously mention it, and even though I was currently staying with the person I had the crush on, he continued to support me. But I noticed that I felt happier and genuinely -better- around him. He cheered me up far more often, and was always there to make my day far brighter than it had been before. He became my closest companion, and with a confused heart I realized that I needed someone more like him. Soo.. in the predictable end to this story, I broke things off with the other boy and turned around to go back and choose this one.
What's odd is that soon after I realized his love for me, I realized my love for him also. It was a strangely joyous, overwhelming thing when I confronted it and asked to date him
One of those moments that changed the way I thought about many things thereafter... and made me consider how truly good things don't have to fade with time.
Sorry for the long story... but I delight in telling it, so I figured that it couldn't hurt to share it