Every one of us will have a very obvious psychological change from campus to society. In the past, you were straightforward and straightforward. Your emotions were all written on your face. When you met someone you liked, you could entrust all your heart to them. But when you met someone you didn't like, your face would also be full of hate, and people would naturally start to stay away from you.
Although such a character is good, more often, it will attract many people who don't like you. They are accident prone, tactful, and even on the surface they are your brothers, but behind their back they are always stabbing you with various knives. Therefore, we should treat everyone with one mind.
Most of the time, the person who gives you these signals will clearly "look down on you", so don't go up there and put on a hot face.