Actually SasuKarin is the second best pairing with plot-relevance in this manga.
I'd advise you guys to read this:
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No chatte not you .i thought you are smarter than this . But. Guess everyone has an opinion
For me i dont see any pairing develpment or any pairing at all . Dont forget karin is a villain . If any girl would be with sasuke it would been sakura.
However sakura and naruto are very close
But its still not prove sasukarin all there so called moments were karin one side feelings . And the sorry part even though it was so shallow it was the end of there moments .
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Out of topic
Now thats sasuke is good again and with team seven him and sakura will have the biggest chance
Kishimoto said " sakura is very important to sasuke but he is busy with revenge he wont replay her feelings in the mean times "
"In the mean times " this mean he will replay some day .and guess what his revenge days is iver and now what the last thing he done ? Saved sakura acknowledged her .
Sakura character was in love with sasuke the whole manga even when he was evil .but when he finally comes good you think she will move on ?
Sasuke changed sakura a lot if you notice he tought her a lot thats one of the reasons why i like them .
Something else i like how sasuke doesnt underrate sakura and see her good fighter .
In part one sakura was down because she is not in par with naruto and sasuke . But no one noticed that other than sasuke he felt she was acting strange and not the loud annoying sakura (which he secrertly like) he even want to comfort her .
And he tells her That she is the best at genjutsu . In Sakura mind while she almost in tears she say thanks sasuke.than he let her break the genjutsu . And than give "thats my girl "smile to sakura.
Now in chapter632 sakura say she always wanted to catch both of naruto and sasuke ( like in chunin exam)
Than she show her new powers . Naruto and the rest are in shock . But sasuke is smilying the same smile back than . Even though he didnt know she had super strength he knew sakura was great.
Sasuke and sakura have deeper meaning than sasuke and karin .
I bet karin will end up with suigetsu i just have a strong feelings it will happen.