Part time bulimia...how to stop? 10 yrs now...?

ok im finally admitting it. i have bulimia. i have been bulimic for 10 years now. but its "part time" like an episode every few months...last one was 4 months ago...ill binge and then purge 1-2x in 2 days...and then im done. ive realized i do this when big stress hits, ill just start eating and feel so bad about eating, that i have to "get rid of it" and boom i get rid of it. but then i feel like a failure because of it. i want to beat this and when i feel like i have it beat, i relapse into another episode, every 3-4 months....sometimes longer. its been 10 yrs now, and its always been this "part time' way. i know its bad though, i know i know i know, but i cant stop, how do i stop???? im aware its bad and want to stop, i say im done and then its like im under a spell when it happens...any help out there????? im thinking about going to talk to someone since ive pinpointed what triggers it, but any tips from anyone? please no smart comments...i cant believe im admitting this...