I know how you feel. Sometimes you just feel like no one understands you, that you have this whole universe in your head that other people don't. But the thing that I've realized is that others actually do have their own universes, it's just hard for me to get to those, because I don't connect with that person very well, or we are too different, or just because of circumstance and inconvenience I don't get to know that person well. I think you just have to accept that few people are going to share the exact same universe as you, but that perhaps you can find people to share bits and pieces of that universe to start with. Just wanted to say I understand how you feel!
Thanks - I'm aware that I'm a side show to everyone else - it's just I wish I had someone to share things with.