Can you tell him how your feeling? That you know it is irrational but you still feel that way due to your own insecurities? I know how you feel I have been there before. You have to trust in your relationship and to be honest if he was going to cheat it wouldn't matter if he was out at the shops or at work. Have faith that you are the woman he wants because he is there with you despite your problems which to me would mean he values you as the person he wants.
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