How long till I am healed of jealousy?

I have been extremely jealous/enraged with prettier women than me (or so I believe, dream up) for over 15 years. I've never really gotten over it, but it can subside before it has a recurrence again. I have told my mother in law off (she is the main target of my problem these days, as she looks young) and told her to stay away from me and that I want nothing to do with her. I blocked their numbers too. My husband says I "better get cured of this asap and that it should magically go away". I cannot afford counseling and all the free/low cost referrals I got in the area are for counselors no longer participating in the programs. The church hardly ever calls me back for their counseling, but I have had decent success with the extreme counseling the church gives for free called Sozo. How long can I expect this to last?