The speaker has just learned that someone got into a fight on their behalf, and they're torn about it. Part of them is touched. Being defended feels special, and the speaker admits they would do the same in return. But another part wonders what the point was, since the fight doesn't stop anything and, as the speaker puts it, "these things happen."
The poem turns in its last few lines. The speaker says "I'm not worth the fight," then shifts to what they really want: "Don't fight over me / Fight for me." Fighting over someone is about winning or proving something, while fighting for someone means committing to them. The closing request, "Be mine," makes that clear. The speaker isn't asking for a hero, just a partner.
The mood is gentle and a little wistful. The short, plain lines sound like someone speaking honestly, with mixed feelings and a quiet hope under the doubt.