Try psychotherapy, or group therapy. Because of severe agoraphobia ive lost over a decade of life. But after years of psychotherapy, stay in mental hospital, I've got better, met people I can call friends. Now I'm 32 and starting life like I should 10 years ago. It still hurts a bit since time cant be turned back, it's really hard to start from nothing at this age, but it is possible, so don't worry you can't change the past, but you can change the future. The thing is, it's you who have to make sure first step. Like talking to psychotherapist, talking to even random people. You said 'I hate talking to people because I have nothing on my mind' so talk even about the weather, seriously try new things, read books, try video games, just whatever what can widen your horizons, then you'll have things to talk about