Complex sentence: Noel is still a virgin, and her contemplative nature gives him a desire to be a better, stronger person, but Tip doesn't approve of Paul dating his younger sister, which leads to a rift between these longtime friends.
Split into simpler sentences: Noel is still a virgin, and her contemplative nature gives him a desire to be a better, stronger person. However, Tip doesn't approve of Paul dating his younger sister, which leads to a rift between these longtime friends.