Does your boyfriend want to learn? If not, then nothing you do is really going to change anything.
You will find some folks on here recommending books to read - I have to say that most of the books i have found don't really do it for me - they are either not the type of poly I want, or seem to be too much showing the "One True Way".
Some of the best reading I have seen on the subject is for free at Franklin Veaux's site: http://www.xeromag.com/fvpoly.html
- that might be a great place for him to start. Also, you might suggest that he sign up here for his own account - there are many on here who have been through something similar to what you are going through, and could maybe offer different perspectives for him.
Hope this helps.