The loyalty and respect that a man desires is not just for his woman to not cheat on him. This is the bare minimum.
Loyalty and respect for a man means you will stand by him during the most difficult periods of his life. When he feels like the world is against him, he can see that you are behind him, and believe in him when he has not made it, whatever "making it" means by his definition.
Men are humans too, they too are figuring out their map of life and are trying to forge a path that belongs to just them. This journey will take a man to the highest of highs and the deepest of all psychological lows. The battle is not just against external forces, but against his demons within. He will have moments where he will question everything.
Most women will see this as a sign of weakness and will be advised by other women to bail or leave. I believe this is where true bonding occurs. He can see that you are loyal and respect his abilities when he has nothing but himself to offer. This is when he will see you as a true teammate in life, fighting against a common enemy. Biologically, this is where true vasopressin bonding occurs.
The "burden" many women feel during this phase, is similar to how men think about taking on women when things are going right. Many women will bail on a man when he is not performing financially. This is why the love of most women is conditional. Most men know this.
The men who are willing to conquer their failures repeatedly are the men with true intrinsic courage. If he is a man with integrity, he will remain with you, not because he does not have access to other women, but because of his genuine love and sense of duty to you.
All men know that they will be desired once they have achieved a certain level of financial success or status. They also know that these women are only loyal to and respect their achievements and not them personally.
Choose wisely and love well.