Desensitization is something that a person does to make themselves insensitive and or non reactive to something that is harmful.
Think of the worst things that could happen in a relationship. I'm talking the things that make you really sad. Try and role play those things in your head, as if those things are happening to you. Once you do this, you can't be touched and less than likely, those things will happen to you, why you ask? Because it won't bother you enough to resist it and what you resist persist. You attract what you fear. This will help you not attract those things into your life, once you desensitize yourself from those things that eat you up.
Try it! Raise your esteem today, instead of walking in fear of those things that can break your spirit! Desensitization is a way of taking your power back and looking those harmful things in the face and saying , NO!