Re: between engagement and marriage
questioner, i dont have any advice for you except to say that its love allright :D Enjoy the feeling and InshaAllah it will continue after the wedding too. You are right, when we are comfortable with a person after bieng married for a while, we start taking things for granted. The idea is not to do that and if you make an effort to keep the relationship alive, it will stay alive and sparky (is that even a word?).
For times you cant sleep, try reading astaghfar or darood until you fall asleep.