Is it normal to become very tired when i take my glasses of?

This is normal though I don't know how bad your eyes are. When you have bad eyes that and you wear glasses your eyes are more relaxed and not as strained. When you take them off your eyes realize all the strain and you either want to cry or shut your eyes. Its because your eyes are straining so bad to try and see things so its putting a lot of pressure on your eyes. The only solution would be to wear your glasses.

When I take my glasses off I usually get a headache and I become confused... I suggest not taking off your glasses.

keep your glasses on and you will live forever

Yes this completely normal, because everytime you go to sleep and take your glasses off, you're reinforcing this act, your body knows 'take glasses off' = bed time

Your eyes are having a hard time adjusting. I suggest leaving them on, won't be much of an eyestrain then.

maybe you take off your glasses everytime you want to sleep

Perhaps your subconciously taking you glasses off when you become tired rather than becoming tired due to the removal of the glasses. Research/experiment and get back to me.