Eight years ago, Kristal Michaela Silva's sister Kristie tragically died because of kidney failure at the age of 22. Now, Kristal is 22 and thinks about her sister often.

Following her sister's passing, Kristal had moved to Texas but she has since returned to Phoenix, and is constantly reminded of the time she spent with Kristie while Kristie was on kidney dialysis. This week, Kristal was on her way to the gym when she passed by the hospital where her sister was treated.

She said in a Facebook status that it is "so painful" to drive by the medical center and causes her to "cry so hard while [she's] on the road."

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