<human>: I'm 34 and she's 27. I fell out of love a few months ago, and I'm feeling trapped in the relationship. But I know she thinks I'm the man of her life, and that she is still very much in love. We were to move in together in July when her lease is over, but I don't want to anymore.  

The thing is, she did absolutely nothing wrong, she's a sweet girl and a respectable person, I just don't feel it anymore, and she no longer really turns me on sexually. I feel like a horrible person for feeling this way, but I can't help it :( I have no clue why I feel this way, but it's eating me up inside and I can't stand pretending anymore.

I had set myself a deadline for this weekend to end it so that she has time to find an apartment and get ready, but I've been getting panic attacks at the thought of it. I can't bring myself to break her heart, I have no clue how to say it, how to find the words, and I feel terrible for what I'm about to do. I tried to not let it show too much because I didn't want her to be sad, plus we had a vacation planned with a bunch of other people last week (planned a while ago) and didn't want to ruin it for anyone...How do you go from responding to "I love you" to breaking up with someone? It's all I've been thinking about lately...

Please help me find the words & the courage to do it...I'm terrified and sad (shaking as I write this)

Can you condense the text into three sentences or less?
<bot>: Terrified of breaking my GF's heart, she did nothing wrong, but can't stand being in this relationship anymore. Feel like a horrible person that plays with girl's emotions.