Tolerance in this case is not the solution.
I do not think this is an healthy way to carry on a R/S. I can
understand your "unwilling-ness" to walk away. As you mentioned
that she being very sensitive would realise that fact, and will
exploit it. I think women are masters in such no matter how much
they deny.
Women DO NOT enjoy or like competition. I am not sugguesting you
create competition on purpose, but never too little to have more
girl friends and to have more options. Hope you can understand my
course of advice..
Endurance and Tolerance is no longer the way to maintain a RS
anymore (it works during my father's time).. The more you endure,
the more hurt you will receive if she ever leave you.. even if she
doesn't leave you, you will get too used to enduring.. makes you
weak and dependant on her.
Good Luck.