Complex sentence: She has no choice but to confront Patrick, who after stringing her along with lie upon lie, finds out that he is attracted to her, and makes a play for her romantically.
Split into simpler sentences: She has no choice but to confront Patrick, who decides to repeatedly lie to her about his intentions. In fact, after stringing her along with lie upon lie, he finds out that he is attracted to her, and makes a play for her romantically.