Careful Heather, you are starting to sound like an MLCer there......:) Our relationships with our S's all started the same way. There was "I kind of like this person but I'm not sure why" and that lead to "I'm really starting to like being with this person". Which lead to "I want to spend the rest of my life with this person!".
That "ugly, boring" guy, after you get to know them, may just turn out to be someone that you start to think "Why didn't I notice this guy before?". When I met my wife, she was totally different then all the other women I had dated. I couldn't understand what the attraction was at first. But as time went on I noticed that I enjoyed being with her more and more. That lasted 20 years and it took HER becoming a totally different person to end it.
"I just don't feel that attraction for you anymore" was what my W said on B-day. It's a variation of ILYBNILWY. While you may not feel that "spark" right away with a certain person, it doesn't mean that as you get to know that person and you see how well they treat you and how they handle themselves and what life throws at them, a lasting "spark" that never goes out may just be waiting there!
I don't know, I seem to be in a romantic mood this morning!!