Bullet For My Valentine - Suffocating Under Words of Sorrow (What Can I Do) Lyrics Meaning

This song talks about a girlfriend with low self-esteem.

By example, the chorus says
"What can I do to make you feel, you're wanted"

That's how I see it anyways. He's trying to make her see how important is she to him, and she keeps degrading herself. It makes sense to me.