1, he is declaring sovereignty.
Before you agreed to be with him, he was very high-profile and publicized his feelings for you. This kind of boy is actually declaring sovereignty to everyone in disguise. His move is equivalent to telling others that you are the person he likes and others can't take you away. If other boys like you too, they may shrink back and give up because they don't want to be loved. But in fact, the relationship between him and you is not clear, and the boy's doing this is equivalent to driving away your peach blossom.
He hopes to get help from others.
Boys like you and want to pursue you, but his strength alone is limited. He deliberately let everyone around him know that he likes you, probably hoping to get their help and that someone can put in a good word for him in front of you and fix you two up. After a relationship has an assist, it will develop faster.
He is forcing you to agree to be his girlfriend.
The boy pursued you, but you didn't promise to be his girlfriend. In this case, the boy will publicize your relationship and let everyone around him know that he is chasing you. Boys are actually forcing you in disguise. I hope you can promise him as soon as possible. After all, everyone knows that he likes you, and they are all paying attention to your emotional trends and looking forward to your reply. Under this pressure, girls may promise boys, or they may become angry from embarrassment and have an aversion to this boy.
In short, if a boy likes a girl, don't try to force the girl to agree to be your girlfriend through external force, don't take the side door and pursue it seriously. If she likes you, she will naturally promise you. If she doesn't like you, it won't help if you point a gun at her.