07/27/2011 04:50 pm ET Updated Sep 26, 2011

Seven Months Since Texas Teen Hailey Dunn's Mysterious Disappearance

Wednesday marked the seven month anniversary of the disappearance of Hailey Dunn, a 13-year-old cheerleader who vanished without a trace from a small Texas town.

"They say it gets better with time [but] whoever [said that does] not know what they are talking about," Hailey's grandmother, Connie Jones, wrote in a post on the "Help Find Hailey Dunn" Facebook page today.

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"No my friends, it doesn't get better," Jones continued. "I know everyone is saying I have [given] up. No, I haven't [given up] but seven months is a long time."

Hailey, a student at Colorado City Middle School, was last seen on the afternoon of Dec. 27, 2010, when she reportedly told her mother's boyfriend, Shawn Adkins, 25, that she was leaving to spend the night with a friend.

Colorado City is located about 70 miles west of Abilene and has a population of around 4,000.

Hailey never made it to her friend's house. Her mother, Billie Dunn, 33, reported her missing the following morning, police said.

The friend Hailey was to be staying with later told police she had not made any plans for Hailey to spend the night and was unaware she was coming over.

Colorado City Police, along with the Texas Rangers, the Mitchell County Sheriff's Office and other law enforcement departments in the region have conducted several searches for Hailey but have found no sign of her.

In the weeks following Hailey's disappearance Adkins was named a person of interest in the case. According to Colorado City Manager Pete Kampfer, Adkins remains the only person of interest.

"It is an open investigation," Kampfer told The Huffington Post. "Detectives are still perusing leads and doing follow up on the investigations. ... Our new [police] chief is in training this week and we will be working on it aggressively in the weeks to follow."

Volunteers continue to conduct searches for Hailey and are planning to meet up at Stripes gas station in Colorado City at 10 a.m. Saturday to post flyers in the area.

Speaking with KTXS News, volunteer organizer Kristy Lloyd said the group's efforts are intended to "keep her face up as good as we can -- so people won't forget her."

Anyone with information on Hailey Dunn’s whereabouts is asked to contact Colorado City police at 325-728-5294.