Hi Janine I'm truly sorry for what has happened to your marriage after your husband consulted a Life Coach. However please don't tar all Life Coaches with the same brush.
I've posted you before about this. Most Life Coaches follow a code of ethics and have high levels of morality and they don't all charge enormous fees. Don't forget that your husband is culpable too. No man can be 'lured' away and stay away if everything is fine in his marriage - the same goes for women.
You may have been very unlucky but sh** happens and it's how you deal with it that counts. You seem to be carrying a great deal of anger - perhaps you need to see soemone about this. Long term anger is very bad for you and everyone around you and doesn't move you on.
On your point about friends can I just say that friends are great BUT they do not fulfill the same role as a Life Coach or Counsellor because they are rarely objective. Our friends always 'take our side' when we've been hurt, that's why they are friends however sometimes that's not the best thing for us.
Yes, I have trained as a Life Coach, although I only work with Business clients, and take my work very seriously. It cost me a great deal of money, time and effort to train. However I will acknowledge that Life Coaching is not very well regulated at present so there are some 'cowboys' who damage the industry. But we're not all the same.
Although I don't of course know your Personal Circumstances I have personal experience of a very unpleasant and costly marriage break up which came out of the blue after 20 years of marriage and know how difficult it is to come to terms with it especially as some things will never come right again. I also know what a weight was lifted off my shoulders when I gained acceptance that things were never going to be the same. Only once you accept can you move forward.
Good luck for the future. You WILL be happy again and it's a great feeling.