I just want to feel "NORMAL"? (I don't even know what that means anymore)?

I can't relate to any of my friends, or my boyfriend anymore. I'm pushing him away. I don't want to see anyone show up at my doorstep, or I feel like throwing up, I literally forget how to socialize, & I don't know how to "act normal" anymore. Everyone notices how weird I'm becoming. How do I regain control, before it's too late & I end up locked away in a mental institution...or worse..