I've never posted to you in the past, but always kept up your posts b/c it has been unusual, to say the least.
I, also, came into my own limit as well, only you know when you can't continue any longer. If this is what you need to do, for you, and your own peace of mind...I understand you completely...life is too short.
You are your own judge and jury, well meaning people have given alot of input...but again, you know your limits.
I wish you the very, very, best for the future...in my own sitch, I too, said enough was enough...you can still love her and probably will, in some way, but the best is yet to come for you...it will. I really respect your decision.