My friend liked me and said something with a thumbs up expression. How do I reply?

My friend sends you a thumbs-up emoticon just to praise and encourage you. You can just reply with a smiling emoticon. In addition, since they are friends and have a relatively close relationship, there will be no problem if you don’t reply.

In addition, if the message is sent to you in WeChat Moments, only friends with the same identity can see all your chat messages. Replies with thank you and playful emoticons are acceptable. If you are in QQ space, all friends can see all the conversations under the topic, and you can pay appropriate attention to the replies. For your friends' likes, you can chat and share them with them in private messages.