Just watched
The Collector (1965) Credits in the poster.
A social misfit, amateur lepidopterist who has come into some money, kidnaps a beautiful, artsy girl that he has fallen in love with from a distance, and hides her away in his dungeon. He does what he can to make her fall in love with him. He has serious 'putting women on a pedestal' problems.
Tender, insightful, chilling and enthralling. Well worth watching.