Try to understand you have closure that you may always love her but not in love with her, and that she gave you an answer that she cannot be intimate with you.
Other cases that could've happened is that she dates you but breaks up with you without giving you a reason. Or that both of you love each other but cannot be together (she's married, for some reason she still not chooses to be with you but keep dropping words of love making it so misleading). Your current turmoil is not understanding how this could not work when you feel so much and fell so hard for her.
Until you become less attached of how much you loved her, live your life so much that you value yourself or another person. Don't scold yourself on how you have to get over her immediately, feelings do not follow logic nor an arbitrary date/timeline. You can research about grieving and see if you can understand yourself better to nurture your pain. For some it is better to embrace their tragedies and give freedome to hurt than constantly distracting themselves in order to heal and let go.
The first question and answer from this article might help you: link