I think the guy I’m dating isn’t over his ex, how do I confront him about it?

I have been dating this guy for about a month now, and we went out three times.

Things were well. He was attentive, would text me after going out to tell me how much he enjoyed his time and would initiate conversations everyday. We also talked about our past dating history and he told me that he had two relationships 5 and 6 years ago.

But a week ago, he said he has midterms, so I told him good luck and gave him space. One week later, still no texts. Around this time he also started sharing things on social media that make him seem like he’s not over someone. The most worrying was a post someone else wrote which says ‘Good news, guys! I’ve finally moved on’ and he shared it and said ‘Wish that was me’

It’s very confusing because I saw the warning signs when I dated someone who was not over an ex. He was much less attentive, and it made sense when I found out what’s up. This time, it doesn’t make sense.

I texted him ask how he’s doing, and then I’m planning to confront him about the distance. I thought about just ghosting and letting it go, but I feel like I have the right to ask about it since he showed signs of serious interest so it’s not outrageous of me to wonder what’s up. Do you guys think I should text, and how can I phrase it well?
I think the guy I’m dating isn’t over his ex, how do I confront him about it?
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