Bristol Palin has mixed emotions over watching son Tripp, 15, grow up. On Wednesday, August 14, the mom-of-three marked her and ex-husband Dakota Meyer’s daughters’ first day of school via an Instagram Story post, but notably absent from the photo was her and ex Levi Johnston’s son. “This has been the hardest ‘first day of school’ yet with one of the biggest pieces of my heart missing. Tripp has decided to finish out high school in Alaska to be closer to his dad and our entire family,” she revealed of the teenager. “As hard as it has been to come to grips with his decision — it’s truly not abo…
