It may seem weird, but the most disturbing film to me was a TV movie called "No One Would Tell" starring Candace Cameron and Fred Savage(I know, considering the stars...but still...)...it's about a relationship that ends up becoming completely physically and mentally abusive and at the end where she finally tries to break, she goes to hang out with him as friends and he kills her. My sister just ended a very similar relationship, so it really freaked me out.
"Fear" starring Reese Witherspoon and Mark Wahlberg was also disturbing on that relationship note.
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli