Are you sure? Obsession is maybe not the word you want, because obsession isn’t live, it’s a mental disorder. I don’t think you want to send someone you love crazy?
And if you’re keeping your opportunities open, that means you’re not sure she’s the one and you don’t love her anyway.
So now you risk having a crazy person doing crazy things, like stalking you, breaking into your house and stabbing your tires and shit. I kid you not it’s happened to people on this very forum. Crazy people are not attractive or fun.
It sounds to me like what you actually want is to spells, the one to remove the time and contact issue, and a lust spell so when you do get together it’s a lot of fun, but nobody goes nuts. Lust spells are easier and more instant, they don’t fight free will the same way and don’t carry the same risks of going wrong.
For that you want Sitri or Asmoday.