Strong EA after 2yrs M - trying to detach. #3

[Complex]

Does someone here has experience with "toxic friends"? Looking back actually when our marriage problems started is the EXACT time frame when my W found her 'new best friend' at work. She called her soulmate etc.
That took away emotional intimacy and she started to share everything with her instead of me..she is the classic example of a toxic influence on M.
Plus friend is D. Has psychological issues, issues with men, 3 DUIs, sex addiction. She also is an "outside" friend, that she never introduced to her old circle of friends.
Anyone experienced with this?

I'll stick with my DB course of course. Just trying to dig a little deeper on that issue. I won't get distracted from my path through it tho, it's nothing I can change.