To make yourself sound more interesting or hide your own hobbies? Example. I lied to my crush about reading this one book and she wanted to have a conversation about it and I flopped XD
I've lied to my crush, but it's more because he's my friend too and I don't really want to let him know how much I struggle with my feelings for him (he does know I like him). I really value our friendship and that it can withstand unrequited feelings, but sometimes it's hard for me.