First, read the English article below.

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. This will make him want to hear what's going on even more, and you'll know that he cares. Be sure he does not already have a partner. Double-check to make sure that none of your friends like him. You don't want to stir up a lot of drama with your friends, because you might lose a friend and scare your crush away.  If one of your friends does like him, you should discuss who "gets" him. If you can't come to a fair agreement (such as who liked him first, he chooses, etc.), both of you should move on. If you decide to let your friend go after him and they get together, don't hold it against him or her. Stay friends with them. Be happy for them and realize that there will be plenty of other boys in your future. If you don't get the person you like, don't get sad. Be confident in who you are deep down inside and love yourself from the inside out.  Sometimes, after a boy realizes you like them that way, they start to see you in a different light. Even if he says no, he may start to subconsciously think about the characteristics that he likes about you or why you would make a good girlfriend. Shy boys don't always have the courage to tell other people how they really feel, or they don't know how to. If you like a shy boy and he doesn't seem interested, it could be because he gets nervous around you and doesn't know what to do. If he is shy, keep trying to make him feel comfortable around you. Definitely hang out with him in places where he is most comfortable. 

Now, please write a short abstract for it in Vietnamese. Abstract:
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!