I'd take a bullet for him. But not because I'm selfless. In fact, I'm the opposite. I'm selfish. I do not value his life above mine, or mine above his. We are equal. But I could not bear a life containing the absence of his presence. I would rather him suffer my absence. He has the potential to move on. Because he does not love me the way I love him. He could never love me that way. The love I have for him is too strong to live on its own without him. So I'd take the bullet.
I am selfish.
But that is what romantics tend to be. They are never selfless. Only the opposite.