Accept being an option?

So we became friends on August 1 and she knew that I loved her for a long time. Yesterday she revealed to me that she is in love with another guy, and I'd always be her second option. I doubt he would be good for her, and thank God he lives in another city. She likes him a lot, but has never confessed and he is dating another girl. After an argument in which I threatened to end our friendship (I didn't meant, I was very hurt), I backed off and she said that I was now her first option.

I don't know if I should accept that. I don't treat her as an option, but as the only option. I have been really in love with her for almost a year, but I know she doesn't feel the same way, but still said that I'm her first option. Even though I am very nice to her, she doesn't value me as much as the other guy who doesn't even care about her.

Accept being an option?
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