My wife cheated and I did the same to hit back at her, now my marriage is dead

I have been married for nine years, things were good until recently I found out my wife has been cheating on me. To hit back, I also started an affair and it is the worst decision I ever made. Our marriage is literally broken as my wife now sleeps in our daughter’s room, both of us erred and I think it’s time to call it quits. I love her so much and the thought of leaving her is killing me slowly. Please advise on the best decision to make right now...