No you can't. It takes two.

You might also need a new therapist, or a break from therapy altogether, for a while. There are some things that no one can figure out for you, or even help you to figure out. I did years and years of therapy. I found it to be least useful, when I had a real crisis that required a major change in my approach to what I was handling. Therapy is supposed to be about change and growth, but - oddly - I found it tended to keep me spinning my wheels, if I was in the midst of a crisis. Therapists don't want to encourage radical change where there is risk. They don't want that responsibility. I don't blame them. They don't want to instigate the termination of a marriage where children are involved. For that matter, neither do I. That's one of those decisions that you have to make alone.

Therapists are very invested in the proposition that people are fixable . . . that relationships are fixable. That's how they make their livelihood. A century ago a troubled person would "take it to the Lord in prayer." Today, that has been replaced by "go to therapy and work on it with your therapist." And people expect more out of therapists than they would have expected out of Almighty God (if they were religious.) Never feel you have to have a therapist's permission to move forward. Being an adult means that, sometimes, it's all up to you and not up to anyone else. Some of my most important decisions were ones I made without getting anyone's blessing on. Maybe they weren't always perfect decisions, but they were mine to make, and I made them. If it's your sincere intention to be fair and responsible, you'll come to a conclusion you can live with.