Unmutual feelings

Shen Yue love Dylan, Dylan is a jerk for rudely rejecting her love confession.
He said the feeling is not mutual and said hurtful words. Can he take it back when he can finally see Shen Yue in a different light?
Shen Yue's nickname is Strong-Strong because she's really a one tough cookie, she is already moving on and starting to accept that he cannot love her back, because she still believes that when the right person comes, love will finally become mutual.
Is it too late for him to say sorry? When he can see that he is already becoming just a nobody for her.