I'm not a medical professional but I've suffered from bulimia for the past four years. I have gone from counseler to counseler and eventually wound up near death and in an intensive eating disorder treatment facility. I gained a lot of tools while I was there but unfortunately about six months after finishing treatment I had a severe relapse. Bulimia's a funny disorder because you fight against your body to loose weight but because it wants to protect itself it begins to retain most of the calories that you eat, even though you're supposedly 'getting rid of them.' So there I was going crazy because I was puging everything I ate but began gaining weight... again. I tried to apply the things I had learned from various counselers but they wouldn't work. The eating disorder was too strong.
An eating disorder turns into a psychological addiction. I don't know how hooked on your ED you are but unless you're an EXTREMELY strong willed person you will need a support system. I know it's really difficult to ask for help, especially in this area, but I've found that the help of people that loved me is my best tool.
Disraction is another great one; find a book to read, go for a walk, call a friend, et cetera. Maybe try going over the negative effects that bulimia can have on your body, your mind and your life. There are many more tools that can be used but the easiest way to sum them all up is to reccomend you a book called The Overcoming Bulimia Workbook. It gradually gives you tools and helps you to recover. It has really been helping me.
If none of that is helpful you may need to have inpatient or outpatient intensive care.
I really hope everything works out for you and I hope what I've said has been helpful. Bulimia is a hard thing to beat but if you're really ready to recover you can do it.