Hey birdy, it sounds like you're a very deep and introspective person and you probably live a lot inside your own head. That can be bad when you're left alone too much, but the wonderful thing is that people like you usually blossom and thrive when you find your purpose. You may need to talk to someone, or get on a mild anti-depressant for a short time just to get over this hump.

My suggestions would be to find ways to get out of your small world, maybe do some volunteer work. You said you enjoyed performing, so you might be able to find a place to do that...community theater/city orchestra whatever your specialty is. If you have time and don't need to earn a certain amount of money, you might look for a job just because it's interesting to you. Animal shelter, hospital/hospice, a store you like. Sometimes we get so used to our four walls, we forget that there's a whole world going on outside.

One final thought, sometimes being invisible means freedom. If no one is paying attention, sometimes it allows you to really live how you want. Do something just for you; go outside of your comfort zone; buy something you've always wanted, but would never buy; go to a place you'd never normally go. Just break the monotony.