I am sorry you are having sleeping challenges.

I do think it is possible for insomnia to become , at least partially, a habit.
This from another insomniac! Lol.

I have found I need to re-assess my sleeping hygiene now and then. I may be doing, or not doing, something that adds to, or supports, the insomnia.

I have found, for instance, that taking calls from certain people will usually wreck my night of sleep. I no longer take/return those calls after 6pm, maybe earlier if possible.

I have had to take a look to see if there is, somehow, a reward for staying up late/all night. I no longer stay up to watch anything. I might find that liking certain shows, etc, might reward me for having stayed awake. If I truly want to watch any such show, I will watch it on demand or in another way.

There may be other habits or foods, even, that have a negative impact upon my sleep.

I also must take a look at my environment. How is the room temperature? How is the air? Dry, damp, dusty, other?

How is the noise, especially any intrusive noise? If you find there is too much noise there are white noise machines available at reasonable prices.

There may also be psychological reasons which support insomnia. These might include things like PTSD, sleep anxieties, overall anxiety, avoiding nightmares/night terrors, experiencing a change in mood, etc.

Yet another possible"motivator" for some people, might be somehow remaining sleep-deprived in order to avoid facing/dealing with responsibilities and/or events which occur in the daytime. This might be very unconscious.

If we are not careful, insomnia can become a chonic problem , possibly even a "habit" we can break once we are aware of the role it plays for us.

Sometimes, our insomnia is purely a side-effect of med(s).

I have been deeply examining my own factors/motivators which may be supporting my own chronic insomnia.

Whatever the reason(s) for your insomnia, I do hope you will find answers andwill be sleeping soundly as soon as possible.