What the heck did i just see? a ghost? a demon? help!?

im staying with my boyfriend and i decided to go for a walk. i put my earphones in and started going down the sidewalk looking at houses and trees. then i got to a little yellow house with two big windows in front. and in one of the windows was a big black blob wearing a bright purple bow. it watched me approach and moved with me. i stopped and looked at it, and it tipped its head. i saw two big white eyes open up and stare at me. i freaked out and started walking past. it followed me across the first window and into the second. as i was going away i looked back to see it pressed up against the window staring at me. i ran home and told my boyfriend what happened. he suggested it couldv been a person, a shadow/reflection. it was NOT a person. and it was very nice out. i could see inside the house behind it, it was that bright out. im still kinda freaking out about it and im scared to walk around here anymore. so what did i just see in that window? NO, i am not on drugs or anything, so back off if ur just mean