Many times, drug abuse and mental health issues go hand and hand…Summer was recently diagnosed with borderline personality disorder. ‘Stop the stigma,’ says Summer’s mom by Melissa Hale-Spencer After Summer Smith died last Jan. 9, her mother and her young son went through her box of special keepsakes. In the box was an edition of The Altamont Enterprise devoted to the aftermath of a 2000 crash on Hurst Road that killed two teens and wounded a third. The kids had been hotboxing — driving while stoned. Summer, then a 17-year-old Guilderland High School senior, was friends with a classmate who died in the crash. Summer — a beautiful young woman…