maybe if thats the girl thats moving she doesn't know what to do since she will not see you anymore and or has a har way of showing it i bet she is going through a very hard time or she has a hard way of showing love because she never got it before.......,.
You need to talk to your girlfriend to know why she has been avoiding you. You also need to relook at your relationship with her. Ignoring someone is the worst form of communication and you need to find out the reason behind it.
She probably feels weird telling you she loves you, maybe you told her too early and now she feels pressured, and maybe feels that you think she needs to say it...trust me the same thing happened to me because he said it to early