If you're talking about very young guys then one obvious possibility is raging hormones - they just want to get into the girls' pants. Another possibility is simple misinterpretation of meaning.
Ilike is like, like a lot is like a lot love is completely different kettle of fish...you know a guy/girl can say anything but it's up to you to recognize the actions that follow the words as i always say words are cheap it is the actions that follow that gives true indication whether or not they mean what they say, don't be a fool for anyone.
cuz that's what guys do
hahaha, shame on you!
You most likely misunderstood what a guy meant by "like".
Did they guy say he just liked you or was "into" you?
It's the same law that says "do you like my dress"? Answer YES.
Given you added a lot; what Frazer said, raging hormones... <br />
Frazer could be right about misinterpretation though. Easy solution, ASK him why he changed his mind.<br />
Too often people go to other sources to find answers when their best option is to just ask person involved.