Your feelings for any girl are touching. But moving doesn't mean feelings. She is very kind and delicate and deserves your love, but your feelings have brought her warmth now, but if you continue, it may bring her a burden. She doesn't have a boyfriend now, but she will eventually. You have repeatedly stressed that you don't deserve her. In fact, there is no absolute match between your feelings. I don't think she has feelings for you. This cannot be changed. For example, if you read a book one day and your career is established, will she be yours? A girl's point of view tells you that her choice has been made. She may not choose which one, but she will not choose you.
I also have a persistent suitor waiting for me. I have a boyfriend and I am very happy now. I told him to let him go on with his life, but what I got was his disappointment and sadness. I don't know how to face it now. I heard that he has been staying not far from me, but he won't bother me again. I feel bad, too.
Everyone has the right to happiness, and so do you. You can spend another six years loving another person, getting along with another person, finding your own happiness, letting go of your obsession, being her friend, and letting her see your change.
Men sometimes have to understand that fitness is right and persistence is cruel to themselves.