<human>: Can you give me a shortened version of the text?

We dated for three years in high school, then I left to go to a very demanding out of state school that keeps me fairly busy. We've been in an LDR now for 2 years, seeing each other 4 or 5 times a year. Last summer I got to come home for 5 weeks. I was very excited and feeling quite in love beforehand, but when I came home it really wasn't all that great. Despite living together during that time, we didn't have much sex, and when we did, it was decent at best. I felt empty.
Last weekend, because it was convenient, she came up to visit with some of my family. I found myself avoiding her. I didn't feel emotionally, mentally, or physically attracted to her, and was looking forward to the weekend's end. After kissing her goodbye, I began to walk away and immediately broke down. 
But now we're back to long distance, and most of the time I feel nothing. We don't talk much, and when we do we talk as friends. I feel extremely comfortable with her because we know each other so well. This is also the only serious relationship either of us have ever had. 
I do care about her very much. I might even love her still. The thought of leaving her just feels strange and wrong. Honestly it terrifies me, because this is entirely one sided. She's as in love with me now as she's ever been. 
Now I don't know what to do. I feel like I should talk to her, but I don't know what to say. She doesn't have a history of handling conversations like this very well. And I'm scared that if I leave her now it might be premature. I want to do something, but I don't know what to do. I just need advice.
<bot>: Not sure if I love my girlfriend anymore, but I still care about her and I don't know how to handle it. She still loves me.