Did you cheat on your plus one? Are you hoping to make things work?
Rebuilding trust after cheating is one of the most difficult things to do in a relationship but it is possible. It is going to require a great deal of honesty and effort to make amends on your part.
For your partner to be able to trust you again, you will need to change or modify any behaviors that concern or create distrust. This can be anything from choosing more constructive places to spend your free time to a change in friends that may be bad influences on your relationship.
It's a positive sign if you both are trying to work things out. There are general steps to take that will help with the healing and rebuilding process.
1) Forgiveness. It is important for you to both forgive yourselves and each other for mistakes, issues and problems over the course of the relationship. Now is the time to look at this as a fresh start or a new beginning from a place that is more honest. If you can forgive yourselves and each other, you have a better chance of making this work.
2) Communication. Now is the time to put everything out on the table. This doesn't mean rehashing and arguing over the past. Instead, it's time to discuss what you both envision a healthy and mature relationship to be. Understanding what each other expects from their significant other can strengthen your bond. It's a form of making a vow to be the best to each other and to yourself.
3) Acceptance. Part of moving forward is settling the past. What has happened has happened. It can not be changed, it can not be explained away. It has to be let go. The previous experiences are now a part of your future but you can use what went wrong as a learning tool.
Assure your partner that you love and care and that you are working on your relationship and yourself every day. Actions speak louder than words. You can make it work if you are willing to do the work.
Modified from FindYourPlusOne.com answers on YourTango.com