In the night, آپ can hear some footsteps outside your window. یا آپ probably will hear some knocks on your window. But if آپ really want to know if he's visiting آپ یا not, آپ can just put a پھول اگلے to your window. And make sure the window is unlocked and not closed to thigtly. If آپ wake up in the morning and the flowers are still fresh, then Peter has come in the evening to replace the flowers. Try to put the flowers آپ put are roses. But if the پھول withers, don't give up. Keep believing and don't lose hope :)
