Dear Remus,
I know that you have your reasons, but I think that you should really give her a chance. Tonks knows what she wants and what is good for her. She wouldn't be running after you this much if she didn't know that. Believe me! I know what it's like when someone likes you that much, James never gave up on me, and I think that is the way that Tonks is about you. She loves you, Remus, and I can see why. You keep using the too old phrase, but what if she is what will make you happy? Would you sacrifice happiness for what looks normal? Face it, Remus, you aren't normal, but that is no reason for you tune her out. And she knows what she is getting into. Give her the benefit of the relationship and marry her already!
Love,
Liy