whyyyyy I wanna run away

im in my best friend's birthday but I feel like shit I wanna go home but im staying over idk why im like this and feeling like this I need to talk rn but I'm actually all by myself heheh i don't wanna worry her and my other friend or my mom or someone like ??? it would kill the mood its a happy day.. this may sound so selfish but I'm just overwhelmed. I wanna hug a plushie and curl up in my bed til tomorrow