Wanting Her to be Mine

Does wanting someone a sin? Does loving someone when the person you like is taken is a crime?
He's always there but she's always been blinded by love. They've always been crossing paths but he's so confused why she's not into him, Is he still not enough? Is there something he lacks? He seeks answers but for him to accomplish that he needs to be with her as close as possible no matter what consequences are waiting for him at the end of that finish line trying to win her heart. Does he get all that it takes? To be hers and by wanting her to be his.