please help

about two weeks my boyfriend told me he cheated on me he told me soon as he did it I never saw my boyfriend cry but he cried so much and told me he made a mistake and said he didn't want me to leave him i did forgive him because I really love him a lot he really all I got but some of the time the trust that I did have for him is lost and I don't wanna break up with but i don't know what should I do tell him how I feel or what