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?
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.