I think thats a little crude to belittle someone else's love.
Rin was Obito's only source of affection its only natural to think she is special......................................wait, did I just prove your point.....HAHAHAHAAHAHAAHAHA!!!!!!!XDXDXD Oh well, your probably right it most likely didn't have to be Rin. Obito would have fell in love with any girl that was a little nice to him.:x3:
Both were raised without any authority over their heads and with the care of the 4rth/3rd respectively.
You'd think, they'd grow up to become beasts in the wilds, but no, both ended up getting friend-zoned and became emos lol