I am not sure what you actually mean by numbing sensation in your head but numb is the way I always describe my depression. It is a lack of emotion for me. never sad but just numb.

I really love your idea of putting love into you and out into the world. Powerful stuff. Have you tried meditation like in the buddhist form and then with practice trying the love thing and visualizations?

I found that after practicing meditation for a long time there are all kinds of bizarre things that happen and that I am able to direct my energy and love. And that I can create happy tingly feelings in my head and all kinds of stuff. It hasn't cured my depression but it has helped me in life and to better cope with the depression.