Ichigo should be with Rukia. Ever since he met her, she changed his world, cleared his rain (to Ichigo rain symbolizes sadness). Because of Rukia, Ichigo was able to protect his family from Hollows. Ichigo believes that he should protect Rukia in return for protecting him first. He says, "She gave up everything for me, so it's my turn to protect her." Rukia tells him, "If you're in pain, I'll भालू your pain." and "If आप want, I'll listen." And when Rukia disappeared from his life he said, "I wonder if I can keep up with the speed of the world without आप in it." Tite Kubo कहा that they're "more than friends, but less than lovers". And "When they meet for the सेकंड time, their hearts connect. " This is the part where Rukia gave Ichigo his Shinigami powers for the सेकंड time. Rukia is a "ray of light" for Ichigo as mentioned द्वारा Tite Kubo. She's to be the only woman who can cheer Ichigo up when he's in despair. Ichigo once said, "Rukia... thank you... आप made the rain stopped...". In Fade to Black movie, Ichigo mentioned Rukia as a "very close friend". For those who think that Ichigo should be with Orihime, it's true that he has saved her countless times, but only because she's his friend. Ichigo treasures his फ्रेंड्स dearly. If they're in danger, he would rescue them in a blink of an eye. If आप ask me, Chad's pretty close to Ichigo than Orihime is to him. Rukia's the closest to Ichigo.
And lastly, I don't get why this सवाल is in नारूटो Shippuden. It should be in Bleach instead. IchiRuki forever ♥