You don't have to go to gether to a councilor. But you should go alone.
I don't think you have forgiven him.
Why are you together? This is horrible what you are going through.
This time you're the one that is not being honest.
And you simply CANNOT fake it till you make it.
This poison needs to come out or it will kill your relationship.
He is going to have to hear some of this and while it might hurt him so will a divorce.
If you aren't healing then your marriage isn't healed.
You guys would benefit from learning how to talk and listen to each other without hurting or being hurt by the words. A counselor would help facilitate that.
Experience is a brutal teacher, but you learn. My God, do you learn. - C.S. Lewis
Life is usually all about how you handle Plan B. - Jack3Beans
Listen without defending; Speak without offending - FaithinAK