Nobody can value you more than you value yourself. The respect you garner from others is determined by the respect you have for yourself. It is hard to imagine that someone else will have a higher respect for you than you have for yourself.
Begin by looking at all your good qualities and express gratitude. Care for yourself. Take joy in being yourself. Be authentic and encourage others to be authentic.
Next, respect others and expect respect back. If others show disrespect to you choose not to associate with them. Stand up for yourself. When you show respect for yourself, others will follow too.
The respect you garner from others is a reflection of self-respect. The higher your self-respect, the higher the respect that you will receive from others.