It's good that you have awareness of your own feelings of attraction, jealousy, upset, hurt, humiliation, and insecurities. He is in a relationship with someone else and he has informed you that he does not share mutual feelings of love with you. It's important that you've identified some of his qualities such as kindness, patience, thoughtfulness - so perhaps you can appreciate him for these reasons. And acknowledge your appreciation. There are other people who are kind, patient, and thoughtful. So - perhaps it's time to consider meeting others. You ask if you will be able to move on - and the answer is "yes you will be able to move on".