<human>: Provide a brief overview of the text.

My gf and I has been in a positive, healthy, loving and fun relationship for just over a year when out of the blue she thinks we should just be friends. In short - I am devistated. The only prelude to this was her admittance to me of some feelings she had recently developed for another person. 
My initial reaction was to have faith in our love and the relationship we had both worked for, telling her that it's common for people in loving committed relationships to get crushes on other people, but they fade away. This was apparently the wrong answer because she did not seem put at ease by my calm reaction. 
In fairness this is the first major relationship she has been in so many things have been new, but am I the only one who sees that crushing me and shattering our future (dramatic, I know, it's a tough time for me okay?) was a bit of a hasty move in reaction to feelings that have only been around for a couple days? She didn't even give me the chance to help her figure it out, and give us the chance to work through it together. 
I truly love this girl a huge amount and even though I may seem young and naive to many of you out there, I honestly had made a mature commitment to this girl who led me to believe she felt the same.

Am I wrong? Do people who love each other only have eyes for the other?
Should I just try and snuff out the remainder of my feelings for her - even though I really do not think I can manage that?
Any advice on things to say to her to help her get through this, no matter what the outcome may be?
Though it's a dumb teen love drama, I really do need some help and support. Thanks.
<bot>: gf of 1 year broke off our loving relationship because if her recent feelings for someone else. I think it's just a crush and was a mistake to end it all over. Am I wrong?