I need advice??

My boyfriend and I have been together for almost 7 years now. We have a 3 year old son and want to try for another one. We've been crazy about each other since day one but he's suddenly started to act weird. It's been making me crazy so I started snooping around. He has a profile on pof.com!!! But his profile says he wants a friend. Not like a FWB kind though. So I don't understand the profile. And it doesn't show that he's sent or received any messages. I'm not sure if I should talk to him about it or not? Our sex life is great and as far as I know we're both still really open with each other so it's weird to feel like I should keep my mouth shut... I guess I just want to know how you would deal with his online profile..? Or if you have any idea on why he made one like he did?