Marriage counselling during separation?

It sounds like you have taken the first step toward healing your relationship (and yourself) by owning your end of the responsibility and going to counseling yourself. Of course, it takes two to make a relationship work, and it will be necesary for him to be willing to do the work to save the relationship as well. If both are willing to do the counselling, it can be helpful no matter what the eventual outcome is. You may be able to grow as a couple and continue in a happier, healthier relationship, or you may come to terms with your ultimate incompatibility and end the relationship in a healthy way. I would say go with the counselling. and Good Luck with it.