Complex sentence: Tim continues to enjoy the time he spends with Miley and is pleased when Miley's father begins taking responsibility but is upset to realise Miley will spend less time with Faye.
Split into simpler sentences: Tim continues to enjoy the time he spends with Miley. Tim is pleased when Miley's father begins to take responsibility for her, but is devastated when he realises Miley will spend less time with Faye.