Katherine
I don't know. My curse might prevent Spike's method from working. It's not really something I've had time to investigate at home, and I assume it's not an option here. Besides, I got my soul the way I did for a reason. The clan that cursed me thought I deserved to suffer, and they were right. No matter how much I try to redeem myself, it'll never be enough. I'll never feel like I've earned the right to get a permanent soul.
I'm not sure my experience with other dimensions will be much help here. I can tell you that time moves differently in most of them -- you still perceive time the same way, but when you get back home, you could find that only a few days or months have passed no matter how long we're here. So be prepared for that if you ever make it home.
I see. Are you having any trouble adapting to being human again? When I got turned back Besides being mortal now, I'm guessing you've lost your strength and any other powers you had as a vampire? I can imagine that would be rough, to lose the ability to fight back the way you could before.
I doubt I can help with the man you love, but I'll do my best to get that source of fear out of your life so you can be a normal person. That's all I ever wanted for Buffy -- a normal life. I couldn't give it to her but maybe I can help you get it.