I'm curious if you've had these "don't want to lose those dear to me" revelation before. The reason I ask that is you state you've been through many interventions before but if you didn't truly have a desire to break the habits could have been part of their resulting lack of success. It sounds to me like you have a renewed motivation and sense of wanting to change - that could make all the difference in a therapy that lacked previously.

At any rate, kudos to you for realizing you've got an issue and want to resolve it for yourself and those you love dearly. Good Luck.