I've flown across America, I've scaled fences, I've stood under windows and gone out of my way hundreds of times. I'm a hopeless romantic. There's no hope for me.

This quote is about someone who is describing themselves as a “hopeless romantic.” They have done a lot of things in order to try to win the heart of someone they like, such as flying across the country and climbing fences. They have gone to great lengths to make someone they like notice them, but despite all of their efforts, they still feel like there is no hope for them in terms of making that person love them.