Saw it on Tv last year, and it was excellent.
Basic story revolves around a man who may or may not be mentally ill,the main woman in it plays two parts-one the mans stalker (with dark hair) and the love of his life (as a blonde).
Anyway,it was really hard to follow,but facinating. He keeps cracking up because the stalker uses his illness to convince him that they're lovers,even though he knows he loves the blonde.
The end has him in bed with the blonde,then when he turns over its the other one. They start fighting and he smothers her with the pillow,only to remove it and see the blonde.
Anyone know what its called? Cant remember who was in it!