The general rule is to not keep mentioning the word "love". Everytime you say it, it reminds her of how she doesn't want to say it, and just makes her feel more strongly about feeling that way. That's the theory, anyway.
I'd just say something along the lines of, "I have no interest in being snapped up by anyone," and leave it at that. In my sitch, I went all out, passionately declaring that I'd never be with anyone else ever again, which also meant I'd never have kids. It's what I feel, and what I believe, but expressing it to H only made me appear more desperate and unattractive.
Me:30 H:30 Together:10yr H left:Oct3'06,couple weeks before 5th wed anniv. No Kids OW bomb:Jan19'07 My thread: He filed.