The person I like has a girlfriend. When I get angry, he deletes me. I added him with a trumpet, so I posted in the space saying forgive me, kiss Ann or something.

It's a good thing that he ignores you. He has a girlfriend, and you are a third party. If he really gave up his current girlfriend to be with you, it shows that he is a half-hearted person. Even after you get together, there will be a second, third and nth third person like you. My sister has a good eye for a single-minded man. Although he didn't take it personally. Besides, people have deleted you, please save yourself some self-esteem.