Congratulations to you both!
I am on day 8 of 21 and I can tell you that it gets better. There will be times when you have doubts that you can do it, but don't let your mind fool you.
Your body is getting the nourishment it needs and you will soon
For your boyfriends sake...use mouthwash :)
Also - and the purists will disagree - I chew gum.
Good luck to you!