I agree with Open Eyes, that voice telling you that you are not important is lying to you. You are special and you need to believe this about yourself. I know because I was once where you are now. I didn't think anyone would ever care about me, but they do. Sometimes when I'm feeling especially low, I hear that voice again, the one telling me no one cares and I'm not important to anyone - then I STOP myself and remember that I have people in my life now that genuinely care about me.

You can have that for yourself, too, and therapy can help you get it.