This is my weakness and my armor. What do you mean?

This sentence "You are my weakness and my armor" means something like this:

You are very important to me. You are my favorite. I like your appearance, personality and style of doing things. You are my weakness and my strength. You are my life and my motivation. You can protect me, give me a sense of security, or you can hurt me and make my heart ache. You are the one I can't let go of or lose.

This sentence can be used to express deep affection for a lover, and can also be used to describe affection or friendship. It embodies a feeling that is both dependent and strong, both fragile and brave, both sweet and bitter. It also shows that some people and things in life are our weakness, our armor, our happiness, our pain, our happiness and our sadness.