Whatever you value, you treat with respect.
You can tell how valuable you are to someone by how he/she treats you. No one treats his valuables recklessly. In fact, most people protect their valuables with everything they've got and they don't allow anything or anyone go close to such valuables any how.
Your worth or value to a person is shown in how that person treats you. Someone that knows the value you add to his or her life will never treat you with disrespect or disdain. A man or woman that truly values you will never engage in acts or continues to consciously engage in acts that hurt you.
If he or she doesn't treat you right, it simply means that you don't worth much to him or her. Don't waste your time being with such a person in hope that he or she will change and treat you better. No one treats what he/she values carelessly. If you think you worth more and deserve a better treatment, don't waste your time trying to prove your worth to someone that thinks you don't worth much to him or her because the more you try to prove your worth to him/her, the more worthless you would seem in his/her eyes. Move on to someone that will see your value and treat you better for the value you bring to his or her life.