<human>: Could you distill the essence of the text into 1-3 sentences?

She has explained to me that she still finds me attractive, but lacks the feelings she once had. Apparently this started yesterday morning and hasn't ended. 

She said that she feels terrible because I have done everything right in the relationship to make her happy and such, but she just doesn't have feelings anymore. 

I guess what I'm trying to grasp is that usually break ups have reasons, and I'm trying to find an answer out of her. I understand that she doesn't have feelings anymore, but I'm in denial. I have never been this sad before. What should I do now? Please help.
<bot>: Girlfriend [18F] lost feelings for me [19M] and I don't know what to do now.