“My girlfriend just left the county for a year. We always had said that we would break up When she le asdfadsf ”

My girlfriend just left the county for a year. We always had said that we would break up When she left, but she broke up with me a week before she left and said that she didn't see us being together when she got back. Clearly she didn't what me sitting around waiting for her. Now that she's gone she tells me how much she misses me and is afraid I might find someone else. I'm not going to sit and wait for her to get back but should I let her go for good? I love her and I don't want to give up hope.