I feel very disliked, and I don't know why...?

Don't worry, we all feel that way. But the good news is that, like you said, you'll figure it out on your own. I'd been through the same situation and trust me it won't last forever, sooner or later you're gonna find people that are just like you and have the same interests. About being stuck in your room, GO OUT! it's all up to you. :)