Need a good love song to sing to my girlfriend?

I love my girlfriend a bunch, and to show that I'm gonna sing to her. This is the first time I'm going to sing to her. I'm a great singer, in a band and all. I want to sing something alternative rock or something of that nature. It would fit my personality and voice. And she would probably know and like it more. I was going to sing our song, which is Lost In You by Three Days Grace, but that seems so expected and all. Maybe it would mean more, I'm not sure. Suggestions on great love songs I can sing to her? Alternativve rock and around that genre please! Don't link me any pop, country, rap, classic. You know. Something I WANT to sing. It has to mean something. Thanks!