Have a look at the subject of social anxiety / phobia. Believe it or not most people experince this at some stage in their lives. It's a bit like depression in that it's like an episode that passes. If people have hurt you and you are thinking about that then talk about that with a counsellor. Self help books / articles can also help with increasing your confidence and feel good factor. Do what makes you feel good.
There's on thing to remember - home is a comfort zone - inorder to grow you will need to go beyond your comfort zone.
Social Anxiety UK - Links