What does it mean when a guy says send me something so that I can think of you all day?

so we hook up everytime we see eachother but when i ask him he denys feelings, yet he denys that were just friends. I don't know he's weird. but now he moved to another country and he's asking for nudes. he says he would delete them as long as i send him more later. so i was talking to him yesterday, he kept telling me send me something that will have me thinking of you all day...

"thinking of you all day?"
does that mean he likes me?
i dont get it

i caused him a lot of problems to be honest and if it were any other guy he wouldve just never spoken to me again but he's still talking to me and still wants nudes even tho he can just go hook up with any girl in the new place he's in. i dont get him at all...
What does it mean when a guy says send me something so that I can think of you all day?
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