Trying too understand why

I married my teenage love. It only took 37 years to do it. My husband and I have only been married15 months. Both married before. We found each other again.Now not sure such a good idea. I have found on dating sites found his emails to other woman. We fight constantly over it. He says he loves me that it doesn't mean anything. If it doesn't mean anything why does he do it?

What is your email I think I may be able to help you understand as well as him.