Isolation is the breeding ground of all deception. People were not made to live in isolation. We were made for relationships with God and mankind.
You need to get out of bed, out of the house, and into the sunlight of God's love. Let the sunlight nourish your heart and mind.
Also find some people that love you and accept you for who you are, not because you please their opinions or because of what you can do for them.
It would also do you good to start some kind of exercise routine, and keep your commitment to it, no matter how small it is. This discipline will help you get your thoughts and feelings under control, instead of allowing them to rule your life.
Discipline and love is the answer to your battle. I have been through it myself, and the new lifestyle will change your life!
Jesus Loves You!
There is no fear in love; but perfect love casts out fear: because fear has torment. He that fears is not made perfect in love. (1 John 4:18)
For God has not given us the spirit of fear; but of power, and of love, and of a sound mind. (2 Timothy 1:7)