Complex sentence: Jake and Jenna grow closer leading him to develop a crush on her, at first Jenna does not reciprocate these feelings but she eventually realises that he is kind, honest and thoughtful towards her.
Split into simpler sentences: Jake and Jenna grow closer, leading him to develop a crush on her. At first Jenna does not reciprocate these feelings, but she eventually realizes that he is kind, honest, and thoughtful towards her.