There are a lot of support groups and help lines for this on the internet and you may well be able to find out about some from round your local area to help you with this because the thing with these type of situations is that the person who is doing it often affects people around them without even knowing. You will need support for this too to help him get through it. Its good that he has taken his first step forward by admitting to you that he has a problem. You just need to stick with him through this. These type of situations as with every mental problem, takes time. He's got into a routine now and he needs to break that routine. Bulimia can be a form of OCD and can go too far. As other people have said in this thread the only thing you can really do is try and give advice to him and not pushing him into going to see anyone, you have to wait until he is ready to do this and Im sure with your support it will speed up the process. I can't tell you much more than that as I have experience but I am not an expert on the matter. All I can say is good luck and I hope he can be n the road to recovery soon.