You are so welcome - anytime. Those relationships are always the hardest to break off, I think. When the shadow of the person you loved is still there in some way and you can see that kindness, it's difficult to break it off. It feels unjustified somehow. But in the end, you know what you want - - what you need - - to be happy. And when that time comes, you will be ready to seize it and move on. Being of a similar age, I also understand that slightly paralyzed feeling of being trapped in one's life. The myth is that women don't have midlife issues like men do, but that's not really true. We might not want to go out and buy a sports car, but we question our identities just the same. I trust that you will do what's right for you and come out better for it.
One thing - before you call it a day, look in the mirror at yourself and remember what you were like at 18, at 25, at 30 - she's still there. Just wiser. :)