You should try to be the best you can be while still together. Behave as if there will be no splitting. Do not try to force to be the best. Just be you. Do the little things that matter. Respect him. Respect yourself. I believe the therapy has helped you in several ways. Do not try to argue if an issue is raised up. Find a good way of discussing the issue. Try to show you care for him through the actions. Try to be the best mother for your daughter. Show her you love her. I believe there is something that is affecting you the reason you sought therapy.
You have to begin loving and respecting yourself. Consider yourself a good wife and mother. Wherein you have made a mistake ask for forgiveness. If you want to raise an issue, ensure it doesn't turn to a fight. Back away from it or don't act negatively. Maybe if your boyfriend also tried to see from your viewpoint it would have helped, why not tell him when he hurts you? Why not tell him how it is like in your side of life? But, please love and respect yourself. If you do so, you will extend the same to your boyfriend and daughter. It is the first step in getting over what is ailing you. Let him know you through your actions you are trying to be the best you can be. Above all, do not neglect or ignore yourself. It will matter a lot how you will treat your loved ones and friends.