How do i help myself?

ever since i fellout with my friends and lost their respect i been feeling pretty low. i keep trying to hold on to feelings that they tought me socialise with and it sent me mad. some times my mental state sours thouh the roof and it builds an inferiour expression up on my face and can even interfere with the way i walk. its like a mental sensation thats good and thats bad. i built it up as a defecne system to stop people from dragging me down and it worked but has sent me mad. i struggle to leave the house even walk past a person on the street. does anyone understand wot im goin thru.