<human>: Condense the text into a few key points

I had an ugly breakup last summer when my ex cheated on me and I was incredibly hurt. It took me some time to get over. I met the girl I am dating now about four months ago and have been dating for about three. We are exclusive and have a great time together. 

Tonight she asked me if I would consider being boyfriend and girlfriend. I told her that I wanted the title and to be with her; I love spending time with her and really want a long term relationship. 

However, I also told her I was terrified. I do not want another ugly breakup and I am just not sure if I am ready. She said that she can accept that answer and that it is not something we need to do right now. 

After I left and got home, I realized my mistake and gave her a call. She was not happy and said she did not want to talk. She said she "needs at least 48-72 hours to cool off" and then would consider hearing me out.

She did not believe me when I said I truly care for her and want to be with her. She does not want to see me or hear from me until she is ready. I now feel like I have messed up beyond repair.  She put her heart out there and I, in a way, crushed it. 

What do I do? I want to give her space but I am afraid I may have ruined this amazing relationship. I also hate waiting. I am definitely the type to talk things out immediately.
<bot>: Told the girl I am dating that I was not ready to become an official couple and now she wont talk to me. Not sure what to do to repair the damage done.