When your assumption feels real but reality says otherwise — what does it mean?

Hi everyone, I’ve been studying and practicing Neville’s teachings for quite a while now, and I’ve had a few successful manifestations in the past.

Recently, I’ve been manifesting having the entire dorm room to myself (it’s normally shared between two people, randomly assigned by the university). I really desired some peace and personal space, so I consistently held the feeling and belief that the room was mine alone. I genuinely felt certain that it had already manifested.

However, today a new roommate suddenly moved in, and I honestly felt disappointed and confused. I thought I had successfully assumed the state.

Could anyone share some thoughts or guidance on what might be happening here? I’m eager to understand this better and deepen my practice.