PORTLAND Tuesday marks three years since 7-year-old Portland boy Kyron Horman vanished from his Portland, starting off the largest search effort in Oregon history.

His father, Kaine Horman, said it s hard to believe three years have passed, and that he s still hopeful he ll see Kyron again.

There s so many things I d want to say. The last thing that I told him is that I loved him and I d tell him the same thing, Kaine said Monday. I love you, man. Life s not the same. And we miss you. And we ve got so much to do together still.

Kyron disappeared from Skyline school on June 4, 2010. His stepmother, Terri Horman, drove him to school that day. She later told investigators she last saw him walking down the hallway toward his classroom.

She was never arrested or charged, but Kaine Horman and Kyron s mother have long said they believe Terri had something to do with the disappearance.

Related: Kyron Horman's mother sues stepmother for $10 million

Kaine Horman said the case of three women rescued in Cleveland after ten years of imprisonment gives him hope that Kyron will one day be found.

Kaine said he plans to spend the somber anniversary with friends and family. And he said he ll continue to raise awareness for as long as it takes.

Investigators continue to receive tips about the case. Anybody with is asked to contact the Multnomah County Sheriff s Office.

Complete coverage: The Search for Kyron Horman

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