This guy keeps asking me what i did on friday nights?

this guy keeps asking me what i did on friday nights? this guy asked me like 3 times in a row... but lately, he hasnt been talking to me that much. he gives me a warm smile, and waves, or says hi... but today all he did was wave... but then he walked back near me for a little bit, then walked away... i think i caught him looking at me a few times from afar... hm... not so sure whats up... :p. nehow, one time we were talking and he asked me what i did one night and i couldnt remember... so he said can i think of some words to help you remember? and i said yeah. so... he started saying words to help me remember, and one of the words he mentioned was date. but for the past 2 weeks he hasnt talked to me much, only looks at me from afar, or says something casual, like hi or whats up... only waves and smiles... or nods... i sooo dont have a clue as to what hes tryna get at... but ik its something cus a guy just doesnt ask "what did you do last night?" 3 times in a row, randomly, unless he was tryna get at something, or hint something out... i mean... when he said the word date, it seemed like he was trying to find out if i was single or not, by saying "date."