'Rob & Big' star mourns Big's death: 'My heart is broken'

Rob & Big star Rob Dyrdek was absolutely crushed upon learning his former body guard, friend and co-star, Rob Christopher "Big Black" Boykin had died.

On Tuesday, Dyrdek addressed his loss on his Twitter account by sharing some touching personal memories of Boykin, 45, who People confirmed died earlier this morning after suffering a heart attack.

The skateboarder and TV star began by declaring, "My heart is broken," and shared a photograph of he and Boykin enjoying some quality time on a large swing.

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"I don’t want to write this post. I don’t want to believe that this is reality. I am so thankful for you," he went on.

In the tweets, Dyrdek said he thought of Boykin as a brother and was grateful to know and share adventures with him throughout the years. He also said Boykin would never be forgotten.

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Dyrdek also posted a special moment he captured of Boykin holding a baby, thanking his pal for being "an amazing human being and brother."

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The two starred alongside each other in the reality television show Rob & Big on MTV from 2006 to 2008. The show followed Dyrdek, a professional skateboarder, and his friend and bodyguard Boykin on their adventures in California. While the show reportedly ended after a fallout in the friendship, Dyrdek still had a lot of love for his friend and costar.

Rest in peace, Big.