We aren’t official, but he still loves his ex…?

Me and this guy are talking but we aren’t official. We’ve been talking about it and I know we’re on the same page about our feelings for each other. Recently I seen his phone unlock and I went through it ( curiosity got the best of me) and I seen he was still talking to his ex. It was nothing sexual, she was sending photos to him about an outfit and he’ll comment how beautiful she is. One message was him telling her how he still loves her and she still loves him. Should I confront him? Even though we aren’t together? Or just let it play out?
We aren’t official, but he still loves his ex…?
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