I have been verbally abused by w for 14 years. Try to always compensate for everything. Meet someone 11 months ago. Started have EA in may W out in june. Started Marriage Counseling in June. Asked to go to MC way back in March and also wanted to restart ballroom dance class with w in march (we always had fun) said no to both. Though m would never get better started to become distant in march. Than start EA in may.
Wife became physically abusive since june especially after drinking. MC thinks w is borderline acoholic and bipolar. MC does not think M is going to make it b/c w stop going to MC and will not go to doctor to help herself. Just tells me this is all my fault and she has night mares. I feel guilty I did this to her but she does not realize how she has hurt me over the years.. I also have a family business she has tried to come between us.
Should I go and find happiness some else or stay home with just hope that one day everything is going to be ok, like I been doing for a long time?

I am not sure the order of everything that has been going on. You are now seperated, your wife quit counsling and is drinking.
Don't know what to tell you except that you CANNOT expect to work things out with your wife if you are still having any contact at all with the other woman. This will drive your wife to insecure crazy behavior.
As far as the business, your wife again probably feels very insecure right now. Your priority must be what is coming between"you and your wife" right now if you really want to save your marriage.
She won't be as receptive to deal with her problems when she feels that you have someone else already in line to take her place.
Triangles don't work here. All marriages are emotionally abusive at times, I don't know all the facts of yours.
If you want to be married-be commited to it to follow through without any other people (or business) coming between the two of you.
Otherwise leave the marriage.