Need advice!!!

So I met this guy on an online dating site and we hit it off really well. We've been seeing each other for 5 months now. I recently found a pic that I took of him posted on another online dating site. He says he rarely gets on there and is simply looking for people to chat with. Should I trust him? He's been the absolute sweetest guy I've ever met so I'm really reluctant to break up with him. Help please

YOUR recent pic of him ends up elsewhere....another dating site? If the esteem you have for him was reciprocated back to you, he wouldn't need to go on another dating site....even if he "rarely gets on there". He wouldn't need to.........