He is not cheering my acomplishments?

I recently meet a guy that I really like. We have had a couple dates and they have being great.

We already told eachother our interest in a relationship and we have had very meaningful moments, but I started to feel there might be a red flag: he only speaks about himself. He acts very kind and asks me a lot of questions to know me better but I recently share with him that I acomplish the publication of my first paper at Europe and he just say something like "I'm glad you are having a great week" and start talking about an issue at his job.

I get he might not be into research field, or know me to understand why this is important to me, but to be glad for a "great week?"...

Any thoughs?
He is not cheering my acomplishments?
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