A Massachusetts teenager who was set to graduate high school in less than a month is dead after she was struck by an MBTA commuter rail train in her hometown of Abington, according to her mother.Lori Frost said she believes her 18-year-old daughter, Katelyn McCarthy, had earbuds in when she was fatally struck shortly after 11:30 p.m. Friday near the Birch Street crossing.The MBTA Transit Police Department said a deadly crash involving a commuter rail train did happen at that time near that crossing, but did not identify McCarthy as the victim.According to transit police, the victim was "walking along the right of way" when she was struck by the train and that the equipment at the crossing was functioning properly at the time of the incident. Foul play is not suspected.Frost said her daughter was set to graduate from Abington High School on June 4."She had her whole future ahead of her. She was supposed to graduate. She was in driver's (education). She was going to go to Toni and Guy Academy, a beauty academy," Frost said. "She was my whole life. She's my only child. She's my whole heart. My life is never going to be the same."In a message to the Abington Public Schools community, Superintendent Peter Schafer said McCarthy was killed in a "tragic accident."Counselors and the school district's crisis intervention team will be available at Abington High School between 12 p.m. and 3 p.m. Monday for any student who may want to speak about McCarthy's death.Click here to donate to a GoFundMe page that has been set up to help cover the costs of McCarthy's funeral.