Yeah, even I can understand your situation. I used to stay awake at night for so many years. This had created a lot of problems in my life. Since everything runs in the day-time, I struggled a lot and got help from an expert psychologist nearby my place. Insomnia and this condition have a lot of difference. Insomnia is the condition of the inability to fall asleep while in the case of people who love to stay awake at night are not unable to sleep. I think, practising therapies like yoga or meditation may give temporary relief, but if you really want to get out of this problem, then it's better to seek an expert advice.