My Girlfriend is studying abroad wants a break...what to do?

My girlfriend is currently studying abroad in Chile. Before she left I had been dating her for 6 months. I know that doesn't sound like much, but we had a great relationship. Everything was perfect we loved spending time together, it was like a dream and we both felt the same way. But I knew that she would be studying abroad so I gave her an ultimatum. I said that I didn't want to be selfish and ruin her study abroad. I told either that if she wanted to go there and hook up with other guys and go wild, then we might as well break it off now so neither of us gets hurt. After talking to her friends she told me that she would not hook up with anyone because she didn't want to ruin something this special. So she left and we began what was a very successful long distance relationship for 4 months. We skype all the time and still have that magic when we talk, nothing is awkward. But recently she told me that we should go on a "break" because she doesn't want to feel guilty about being a bad gf because she cant talk to me much. So we argued a bit and we agreed to sleep on it. Her best friend and a good friend of mine asked her why she wanted a break. My gf told her that she loved me, but felt tied down and guilty for not being here with me, but she also mentioned how her friends were all going wild hooking up with guys while she was being faithful. I have been 100% faithful and have not even thought about hooking up with another, because I knew I had something good with her. It seems that she doesn't want to lose me, but also wants to get a more liberated study abroad experience. I agreed to the break but after I found out what she said to her friend I think that I am going to reconsider. Tomorrow I plan on telling her that a "break" is just another word for "i want to hook up with other people". Now I know everyone here is uming that this girl is skank but honestly she is the nicest and most innocent girl Ive ever met, all her friends say the same thing. Through the advice of a friend Im going to tell her that we should not talk for 2 weeks. Im going to say that if after that she still feels that hooking up with other guys is more important than our relationship, then we should end it now. I'm a good guy and would never do anything to hurt her, but out of respect for myself I feel it is right to tell her this. What do you think? What should I do? Do you think her intentions are really bad? HELP ME haha