Tell me what to do.

Judging from your expression, I think even if this boy loses, he also loses his confidence. Because he wants the girl to accept him, he has tried his best, which makes the girl less and less curious about him. That's what people do. The easier it is to get something, the less curious he will be, because the boy loses confidence in the pursuit, which leads to self-deception. Boys know that girls' friends are more handsome than themselves and deny it, proving that they have deceived themselves. Advise him to regain his confidence. A confident boy, even if he is not pleasing, will never be annoying.