I think I disagree with most of what has been stated. While I haven't really "dated" anyone per se, I've had my share of crushes and feel fairly well acquainted with the feelings described in the original post. For one, I also do not get over people quickly. Yet, I've had only one friendship fall apart on me, and I've always thought that was far more painful than any degree of awkwardness I've had to suffer through in similar situations. And I was way more into the friends I still have than the one I lost. I don't think cutting my closest friends out of my life is the way to go. (Years at a time? No. The most awkwardness I've ever had to endure was a whopping three months. I was lucky enough to have someone tell me that it's only as awkward as I make it. Thus far, I've found that statement to be accurate.)
As for the ever-strengthening feelings, I found myself repeatedly thinking "Love her more, like her less(romantically)." And I don't think those two imperatives are mutually exclusive. As I use the words, Love and "in love" are very different. While my opinion is probably not one that is too popularly held, I tend to think that love in a romantic relationship and love in a friendship are exactly the same thing. Love is constant and unchanging. Love is love is love is love.(I cringe whenever I hear or read the phrase "More than friends." Similarly with "Just friends." As if friends aren't something spectacular to have around you. Let's not sell short the value of our friendships, okay? Actually, in our society today, I think that love in friendship is much more common than love in romance is, where selfish feelings are far more likely to get in the way.) "In love" is an emotion and therefore highly volatile. The nice thing that I found is that the changeable romantic emotion can serve as a motivator to learn how to actually love the person, at which point the love itself continues to fuel the desire to love, and the "in love" romantic emotion no longer seems so important. Additionally, love is fundamentally unselfish(I Corinthians 13 actually gives a pretty good list of what I think love isn't, i.e., isn't selfish, isn't jealous, etc. ), so I found it to be a great help in reducing my own romantic desires, or at least the pain that tended to arise from them. In the words of Mother Teresa, "If you love until it hurts, you'll find there is no more hurt, only more love."
I don't think that such feelings are even necessarily a bad thing. There's a certain amount of friendly affection I feel even for the friends I'm not in love with. I really like being around my friends. All of them. They're my friends. And so are most of my previous crushes, even though they all know I've been in love with them before. And I still love them dearly. Again, they're still my friends, after all, so why on earth shouldn't I be trying to love them? I'm just as close to them now as I was before, so I see no reason at all to shut them out of my life.
This is a lot to try to express in my first post ever to this forum, and like any well-trained perfectionist, I feel that I was not quite as successful as I would like in explaining all the subtleties and intricacies of my thought processes and emotional experiences (or in giving my hastily written paragraphs as much structure and flow as I would like), but with all the intuitives on this forum, maybe someone will be able to grasp the edges of my meaning. Just thought I'd throw my two cents in, as someone who firmly believes in the value of maintaining friendships, and has had some success in doing so.