My fiance and I were together for 3 year and we have a 20 month old son yesterday I found he had join to dating sites. He came up with excuses but I can't be with him coz no matter the excuse it doesn't add up I feel like I can't trust him but if I move out I will have nothing and I don't want my son to be without before I saw the dating sites our relationship was breaking down what should I do any advice will be appericated