Complex sentence: Rick quickly becomes attracted to Jessie which she seems to return, and continues to share moments of flirtation and it's later revealed that Pete is abusing her leading to a brutal conflict between the two men.
Split into simpler sentences: Rick quickly becomes attracted to Jessie, which seems mutual, and they continue to share moments of flirtation. It's later revealed that Pete is abusing her, leading to a brutal conflict between the two men.