Loving You Like a Friend by pinkphoenix
Feeling like a social outcast and yearning for attention and affection, Nitori scours Craigslist and finds an ad from someone who looks interesting. Their initial meetings are awkward, but soon Nitori and Rin forge a sweet friendship. Unfortunately, outside forces may kill their relationship before it really has a chance to start.
All I can say for this story is "awwwwwwww!" Nitori is so adorably awkward that you can't help but want to hug and protect him. The progression of his relationship with Rin is interesting to watch and I look forward to seeing how it turns out!