I Think I'm Crazy...Please Help Me!?

hey wup..im 15 yrs old and im a sopre...my problem is that i think im crazy...like if im in my house in a empty room..i start to feel people are there...like if im walking...i feel there are teens my age that i dont know are standing in a line next to me..like im walkin in a runway and im alone...also if i have a crush on someone in my school...or someone ive been thinking about lately...i tend to think they are in my house...like an imaginary friend kinda...i start to serve them like they are really in my house...like if im bout 2 get a drink from my refrigerator..ill ask if they want some..its weird...i know im a lunatic...what do you think..and what should do?..