Telling me this while dating?

The 1st date with this guy (who was already a friend) was great, it went 4 hours and he even asked what I thought of taking this seriously.

He arranged the 2nd date, but seemed distant this time and at the end of it he tells me that he was interested in another girl and since he realised he has a chance with her, he's gonna dump me. How does this sound?

Telling me this while dating?
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