Dear Question Asker, I am grateful for the opportunity to respond to your inquiry.
From the questioner's own account, it is evident that the inability to sleep alone is a significant source of distress and inconvenience.
The following analysis is offered in the hope of providing assistance to the questioner.
1. Identify the source of the fear.
From the subject's account, it is evident that the subject experiences a lack of security when sleeping alone, accompanied by involuntary imaginations of frightening content. It would be beneficial to ascertain whether this phenomenon occurs exclusively during sleep, or whether it manifests in other contexts where there is a lack of light.
If the questioner does not experience fear when alone in the dark, but only when asleep, has the questioner ever observed a distinction between these two states?
It is therefore pertinent to inquire as to why sleep evokes such a feeling of fear. When the subject was a child, did an incident occur that was particularly impressive, or even frightening, while they were asleep or before they went to sleep? When this incident entered the subject's subconscious as they fell asleep, it caused them to be unable to sleep alone.
If the questioner can recall this incident independently, it may be possible to alleviate and eventually resolve the situation in which the questioner is unable to fall asleep independently.
2. Diagnosis and Treatment of Sleep Disorders
There are numerous potential causes for sleep disorders. One such disorder is "ghost bed-pressing," which may result from a range of factors, including physiological, psychological, or disease-related causes, as well as drug reactions.
In light of the aforementioned factors, it is this author's recommendation that the questioner seek medical attention at a qualified medical facility. Only through a comprehensive diagnostic evaluation can the underlying cause of the sleep disorder be identified, thus enabling targeted treatment.
3. It is important to pay attention to one's sleep rhythm.
In the event that the questioner experiences disturbances in their sleep patterns, it is recommended that they pay attention to avoid similar influences, adhere to a consistent sleep schedule, and refrain from engaging in activities that may disrupt their sleep. Prior to bedtime, it is advisable to engage in relaxing activities such as reading or listening to music, and to avoid watching movies or reading books that may trigger negative associations.
It is recommended that the subject go to bed at the same time every night in order to establish a sleep rhythm. It is advised that this routine be maintained consistently. In the event that the subject experiences the perception that sleeping alone may result in the emergence of distressing fantasies, it is suggested that they utilize auditory stimuli, such as white noise or light music, to facilitate the onset of sleep. This approach may prove effective in mitigating the influence of such associations.
It is my hope that this response will prove beneficial to the questioner.


Comments
I can totally relate to your struggles with insomnia and the fear of sleeping alone. It's comforting to know that turning on the light helps you feel safer. Maybe incorporating a nightlight or a sound machine could also create a soothing environment without overheating. Finding a sleep buddy or even a pet might provide the comfort you need. Therapy could also help unravel these fears, allowing you to rest easier.
Sleep issues can really take a toll on us. I understand how the thought of supernatural elements can make it hard to relax. Have you considered trying relaxation techniques before bed? Meditation or gentle yoga might ease your mind. Also, a weighted blanket offers the security of being wrapped up without the heat, and it simulates the feeling of not being alone. Adjusting your room temperature and having a consistent bedtime routine can improve your sleep quality too.
It sounds like your experience with sleep paralysis has brought back childhood fears. That must be really challenging. Perhaps setting up a calming nighttime ritual, like reading or listening to soft music, could signal to your body that it's safe to sleep. Keeping a nightlight on or having a trusted friend or family member nearby can be reassuring. Cognitivebehavioral therapy for insomnia (CBTI) might also be beneficial in addressing both the insomnia and the anxieties around sleep.