Relationship Problems.

Hi, my girlfriend broke up with me 3 days ago for the second time. We have been dating for about 16 months and have been very intimate and close. Unfortunately, we were very dependent on each other and very possessive. Our relationship lasted like that but although we did less and less of being dependent and obsessing, we were more impatient. We still loved each other but one day, just because of a little obsession, my girlfriend exploded at me and said she does not want to do this anymore. She told me that she wanted to do so much with her life but felt constrained when she was in a relationship. Meaning, she wanted to travel, help people, go on church missions etc. I was always willing to support her but she had lost her patience completely. When she broke up with me, I constantly did the DO NOTS and always called her up. This lasted about 1 months as our longest time not spoken was 3 days on and off. Most recently, she called me up and told me about one of her problems and ended with a note "I love you." Few days later, we went out on a date and although at first we were quiet, we broke it down into tears and spent a wonderful day back together as bf/gf. Unfortunately, although i felt that she did not want to rush this, I thought it was okay. For the next 3 days, we spent great times together smiling and laughing and we did get really intimate. After those 3 days, it was time she had to go on a 1 week trip w/ her friends. I wished her a good time and waited. During that week, I felt kinda happy that I felt more relaxed and less possessive. At the same time, I didn't also miss her too much besides the fact that she wasn't replying back to my email. However, when she did come back, we got into a small bitter argument real soon. Just when that happened, she exploded again and said "I don't think I missed you and we did not miss each other at all." We talked afterward and she told me that while she has bought souvenirs for her friends and family, she forgot to buy me one. She also mentioned that she never wanted to be in a relationship right now yet she had no option but to get back after the date...and kind of blamed me. I was in shock...did not know how to respond to that and we just hung up. I called her again to ask her why she was being like this and AGAIN, she treated me with her cold attitude, rudeness and constantly told me to go away and that i was being annoying. At one point, she had used profanity against me. The following evening, I texted her that we'll be done for good, the way she wanted it. She replied back that she hoped that I understood that right now although she loved me, she did not want to be in a relationship. I could never understand that part...But anyways, the next day i had to go pick up my ipod that I had lent her for the trip. She told me that she left it in her front porch and also told me that she left something there for me. My mind was set and did not want to take anything of hers. I acted so desperate and without dignity the ENTIRE 1month period we broke up and got back that i wanted to show some dignity. When i got there, she had left me a pair of woven mittens but of course, i left it there. Sometimes, I think that maybe she was lying that she did not buy me anything from Peru but despite that...I don't know what to do. Knowing this girl inside out, she would never be the girl to not miss me. Bu since she was being so cold and defensive while constantly telling me to go away, I am convinced that she does not miss me anymore. What do you think? Do you think I should just move on and stop being clingy? I have not called her the past 2 days and I just want a decent and reasonable answer...please help.