To rebuild trust you will need to show great leadership and have courage and patience to work on your shared issues:
1. Remember how much you trusted your partner at the beginning of your relationship - this was because both of your hearts were open at that time. You can return to that level of trust if you can rediscover the love that brought you together in the first place. You can lead this process.
2. Somehow you must start talking about your feelings, worries and insecurities with your partner. It is only through heartfelt, open and honest communication that you can begin to heal the emotional issues that have damaged your relationship.
3. Recognise that if your partner has strayed, or is tempted to stray, then they are hurting inside.This hurt was present within them before you ever met. Really want to understand your partner's needs and insecurities and be willing to share your own. As you do this your hearts will tend to re-open and the trust will begin to build again.