Welcome to SI.
Your story might not have the twists and turns that other have, but it doesn't diminish the pain of betrayal. Try not to sweep this under the rug and make yourself feel that you shouldn't feel betrayed and hurt. These need to be addressed and worked through in order for you to heal from things.
There is nothing wrong with forgiving and falling back in love. And there is nothing wrong if you feel that you can't do it and have to walk away. You are now on your own journey with your Husband. The two of you will choose the paths to take and that will determine where your marriage ends up.
Use the site for learning and support. Read through posts and the healing library, helping others along the way can be uplifting too. Keep posting with any questions you have or to work through your feelings.