I have oneitis for a girl. Basically I met her a few months ago when she was with her bf but they broke up a few days later . Didn't see her for awhile but a few weeks ago I began messaging her and she was hanging around with me and a few others. She seemed interested at the time . But about 2 weeks ago whilst she was babysitting she invited me over. Flirtations happened from both parties, she felt my arms etc . However I knew the red flag was there when she said I was the first guy not to make a move, which made me decide to up it . However my first fuck up was telling her I liked her . Then as was leaving ( she always gives hugs to everyone ) I went in for a kiss. Heart was racing and she noticed that unfortunately. She then basically said that she really wants to but due to how bad the last relationship of 2 years she can't because she feels like she would hurt me . Then the dreaded " can you still talk to me " was thrown on me. For a few days messages were normal . But the replies have gotten shorter and I may have to wait up to a day for a response. So how do I get over this ?

Tl;dr: oneitis. Advice would be appreciated greatly.