HELP I can't stop lying because i WANT HIM to like me more!?!?

This guy i know he likes me and i like him tooo but everynow and then when we talk online, i like little lies and I know its wrong and i shouldnt do it but i cant help it like if he goes yeah i love them i have all there songs i go same! when really ive only jus heard of them and sorta like them..and i dont intentionally do it,, at the moment were friends and hes already told me he is a good liar and i said im a bad liar but in life i dont lie only to my parents sometimes. but now ive started doing it to him, im not forcing anythinggg it just comes out sometimes and i need to stop! =/ anyone else do or done this and how to stop!!