I'll probably get to the rest of this after I get off work tomorrow, but let me just address this:
It seems that maybe you didn't pay attention to anything related to Obito's backstory, else you wouldn't have missed all the times Rin was actually nice to Obito and actually supported him. So no, Obito had a reason to love her, Sakura did not have a reason to love Sasuke. Obito, even in his darkest hour, wasn't nearly as shallow as Sakura was. He actually loved Rin on virtue of how she treated him. Try again later.
I actually addressed this
Now now I'm not trying to compare Obirin with SS, Obirin was supportive and kind while SS was anything but. It's just that it it has one thing in common with SS...it lacked the reason , it lacked something that explained why Obito felt that way for Rin, he was still only 13, he had a crush... okay but why should we as readers believe he had something more? What was shown to us?

















