1, warm to others, cold to you.
If this boy is cheerful and good at communicating with others, you should also observe him carefully when you contact him again. Whether there is enthusiasm for others and loneliness for you, but a cold attitude. If so, he probably doesn't like you.
2, hastily end the topic, never take the initiative to continue to extend the topic.
Boys are willing to chat with their favorite girls, and when a topic is about to end, if a boy wants to continue, he will definitely take the initiative to extend this topic and turn to another topic, so that he can chat for a while. If a boy ends the conversation voluntarily and often doesn't extend the topic with you, it proves that he may not like you.
3. Wechat resumes are few words or don't reply at all.
If you chat on WeChat, you will find that his reply is often "Oh", "Well" and "Hehe". Explain that his mind is not here, I suggest you give up this boy.
4. Reject your invitation.
This is easier to explain, if you invite him on your own initiative and the boy refuses the invitation. If you refuse occasionally, it is possible that he has other important things to do. If you refuse one after another, prove that you are not his type.
In fact, girls like a boy, so don't take the initiative. You just need to give him a chance to get close to you and see if he approaches you actively, so you can test his attitude towards you.
I hope my answer can help you.