Có một số cách để bạn nhận ra liệu anh chàng đó có thích mình hay không. Đảm bảo anh ấy chưa có bạn gái. Không từ bỏ!

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
There are a couple of different ways for you to tell whether a boy likes you or not. Here are some tricks to find out without coming out and asking him.  Ask him to carry your backpack to class. Tell him it's heavy and he looks strong enough to carry it easily. If he says yes, it probably means that he likes you enough to do favors for you, and likes that you think he's strong. If you want to tell one of your friends something when he's there, tell him to close his ears or to step back a little.