No, but really, if two characters argue and fight, or are even mildly annoyed with each other, I will ship them. This is my favorite thing to read. If there is even a hint of this in the main book romantic pairing--I will buy it, and I will devour it.
I am all for a good love triangle, but now there are a lot of authors who insert a second love interest in for the simple sake of creating a love triangle. The other character will be introduced, there will be one of those aforementioned bolts of lightning, and then the main character will be distracted from the one person she's supposed to be with and who we're been building to. A good example of this is the Matched trilogy by Ally Condie. I ADORED Matched, but the last chapter, and the next two books are real rage triggers for me.