Fallacy

Confused!!

The following night I was in my room alone reading my book. Well, I was thinking very intensely about Arhaan how are you look at how we talked how we met and my head was heavy and paining . Suddenly the bell rang .
"Open the freaking door naira" said a voice . I peeped through the door and there was my delusion standing on the other side again "Arhaan " . I opened the door And kept staring at him for a while. You are not real I shouted and screamed.
We got into an agressive fight he was telling me how much he loved me and how he had been trying to call me but he figured out that i blocked him. I listened to him numbly for a 30 minutes and it literally felt like he was answering all the questions I had asked him in my mind . The questions that kept me up at night . This one episode was making all of Kabir's help for me go in vain and that is why I wanted to end it as soon as possible .
I couldn't hold my pulses i took the vase in my hand and i hit Arhaan is his head .
He lied dead in my apartment with all blood over the floor . After 20 minutes of sobbing and crashing all the glasses on the floor i called Kabir .

Naira -
Kabir , I killed him . I killed him forever now he will never return . I am sorry all your efforts won't go in vain now . I will recover I promise but i killed him . I killed him.

Naira, are you out of your mind.
how can you kill someone who is in not real ? Arhaan is not real ! Naira . You stay there and don't move I'll be there . Please do not panic .

Kabir reached my apartment and he was shivering to the sight . I was sure at this point that i had killed someone because kabir could finally see him . Although not sure if he was Arhaan or a random guy who walked in but i imagined him as Arhaan and hit him impulsively. I was still in my usual dilemma was Arhaan my delusion or was he real ? . If he isn't and who is this guy i killed and if he is real did i just killed the love of my life ?  So many questions were in my mind but i was waiting for kabir to speak .