Isn't anybody going to bring up "death"? That is the end of the end and there is no going back after that. Other things you have had chances to correct.

10 Q for your breezing comments , Here is my answer to you .
infidelity : infidelity is a good point to be noted. Cheating on a good person is like throwing away a expensive diamond and picking up a Rock .
Lack of Respect : Its just a give and take process , I doubt if this can end a relationship quickly , respect can be earned and given from time to time . But yes i consider that Point you mentioned .
Lack of Intimacy means emotions , love, thoughts , laughs , efforts , smiles memories fights and passion , If these are lost I am sure it can have a Great Impact on ending a soulful relationship .
I Hope my answer has fulfilled your requirements