You don't need a spell for that. If you have a strong enough will, your spirit can stay here after you die.
However, it will destroy your ability to reincarnate. I've known a few spirits who did exactly what you are describing and they all regretted it. You can only do so much when you're dead. Most of them are VERY bored. It gets quite lonely after a few hundred years of being dead.
I don't suggest it, but if you really want to do something like this, I'll contact my spirit friend and tell you how he did it. Contact me privately. This isn't something I'll post in a public forum.