Bristol Palin and Levi Johnston have finally settled their child custody dispute over son Tripp seven years after the boy was born. Levi announced the news on Facebook, writing; ‘I’m so happy to have my son in my life, and to put all of this back in forth in the courts behind me. ‘It might have taken me 7 years and cost me around $100,000 in lawyer fees, spread out among 3 different lawyers, as well as a lot of patience, but it was all worth it. ‘I’m happy now to be successfully co-parenting.’ Bristol seemed to confirm this, posting a message on her Instagram account that read; ‘The best security blanket a child can have is two parents who respect each other.’ Scroll down for video Big news: Levi Johnston announced on his Facebook account that he had settled his child custody dispute with wife Bristol Palin (above with son Tripp in January) Pricey: ’It might have taken me 7 years and cost me around $100,000 in lawyer fees, spread out among 3 different lawyers, but it was all worth it,’ said Johnston (above with wife Sunny, one of the couple’s two daughters and Tripp) Johnston also wrote in his Facebook…