on again off again

Hi,
I just started this account because I'm curious about something...
When I was 13 I developed bulimia nervosa (I'm 24 now)
I would say it got pretty bad when I was 17/18... purging almost 3 or 4 times a day
Into my 20's I decided to try and stop
It has gotten much better now I would say. I can go months without even having a desire to purge.
I feel as if I am "healed" because I am in a much better state physically, and mentally. Although it is always on my mind.
However... I feel as if I go through waves.
For example, today... I purged and I didn't mean for it to happen. It had been MONTHS since I last thought about it... I just could not help myself
Now I'm thinking I must be doing this out of habit... I don't know. I care about my health, I try to eat healthy and exercise. That helped me a lot during my "recovery"
I feel like this is a part of me. And I will do this until I'm older! I don't want that...
Well, I guess what I want to know, is if there is anybody out there just like me?
And if you can share some advice
thank you

Maybe you could look at the reasons behind it? Like what is it, a real habit, an addiction, a way to relieve stress? and then take it from there. The self destructive urges show up a lot of the times when a person is not in such a good place or got somehow triggered by something...