AITA for wanting to divorce my husband after discovering his decade-long secret life even though he claims to be in recovery?

My husband of 3 years (together for 10) had been hiding a decade long history of secret porn use and other deceptive sexual behaviors. It is important to note that he never "disclosed" this to me; I found out on my own. He only started "recovery" and therapy after I confronted him with the evidence. He has been "clean" for about 4 weeks and is begging for a second chance.

​The problem is that this discovery shattered the foundation of our marriage. I’ve realized that for years, I’ve been doing all the emotional labor, soothing all our conflicts, and managing his emotional instability, while he was living a completely separate life. Now that the truth is out, I don’t feel betrayed...I just feel so detached. I don’t miss him, I don’t feel drawn to him, and I honestly just want to be single and independent.

​We have our first couples therapy session scheduled for tomorrow because he is desperate to "rebuild," but I feel like I’m just going through the motions. To make matters worse, I just caught him scrubbing his digital history (deleting emails) from an account he knows I have access to.

​I feel like a "bad person" because he’s "trying" (therapy, staying clean), but I’ve completely checked out. I’m currently trapped living in his parents' house with him, and the pressure to reconcile is immense.

​AITA for wanting to walk away from this marriage instead of giving him the "second chance" he’s begging for, especially since he’s still hiding things?