Correct grammar flaws in the given text:
After years of contemplating between staying with Marianne-who was more or less the joy of his parents' life, not him, Marianne-for life or leaving and start fresh, he has finally chosen the latter, thinking that it was the right decision to make at that moment.
After years of contemplating between staying with Marianne-who was more or less the joy of his parents' life-not him, Marianne-for life, or leaving and starting afresh, he had finally chosen the latter, thinking that it was the right decision to make at that moment.