Gentleman-like qualities are greatly appreciated by a woman and play a key role in securing their interest.
If you consistently show her that you care for her and are there for her through everything, she will never lose interest in you.
Women are most certainly to lose interest in men who cheat.
It is crucial for you to remember that your special gestures during the beginning of the relationship are what made your girl fall in love with you.
If you are consistently backing down from your word and breaking your promises, your woman will start taking you as a non-trustworthy person.