Cheating help please well i dk?

well i need help withmy marriage we have only been married 3 monthsand i can t trust my wife we have bee dating since the 9th grade in high school abou t 10yrs abd i cheated on her numerous times and she said that she was over it and the last time i cheated on her was 4 yrs ago and i promised myself that i would not betray her ever again,so my wife kind of cheated on me two month beforeour marriage and she could keep it from me she said that she had to tell me before we got married,but when she told me the story it was like she came 2 her sense she let him insert his _____ and she said i cant do this and left. and that i feel that i cant get over help please