She sent me this screenshot on her birthday and asked if it was me, because it wasn't me, maybe other boys liked her.

This is obviously suggesting that girls should also have a good impression on you. If they don't, they can't ask you directly.

Since you also like others, you should hurry up and pursue them, or others will start first. You'll regret it then.

If you like, confess, a silent knight may eventually perish in silence,

Don't guess other people's minds, one person can't guess.

Even if you don't accept it, you can make the next plan.