It's difficult, getting out with friends and doing stuff will help a lot. Today I am going on a Thansgiving outreach with a Church that is close to me. I am excited to go and get away from this house for a bit. You will feel guilty for going out, but just do it anyway. Get over your fear and anxiety of having a life. After a few times all the negative feelings of going out will start to fade.
Here's my challenge to you. Find minimum two things that you can do away from home and family and do it, then post on my thread how much fun you had. I will do the same if you would like for us to push each other into a life.
You can not change your past, but you can ruin a perfectly good present by worrying about the future.