<human>: Can you summarize the given text in a few sentences?

Throwaway because my so knows my account.

The title says it all pretty well. SO is on the opposite coast (of the U.S.) for an internship. She is making many friends and impressing her boss, but has been distant. I chalked it up to the time differentia but I confronted her a month or so ago about being somewhat cold and short in text replies and she agreed to try and be better, but said it is hard because she's trying to make friends and connections with people she hopes to be working with in her future. She still wants to be with me and I'm actually on my way to visit right now, but the problem hasn't gone away. In that discussion I specifically said that I feel stupid saying it, but when I text her that I love her and she doesn't respond it makes me feel terrible, but still she doesn't return the gesture. I've tested this by saying I love you immediately at the end of a conversation when she was previously rapidly responding. 

On skype and the telephone she says I love you without me prompting. I don't know what to do reddit, I'm not sure if this is just an issue in my head an I'm projecting my fears from a previous faile LDR where I was cheated on for months, or if this is legitimate. If it's legitimate, how should I go about bringing it up? I have a really awesome weekend planned for the two of us and I don't want to spoil it too much.
<bot>: SO stopped reciprocating 'I love you' texts but not over Skype or telephone. Makes me incredibly anxious and uncomfortable.