Why would a man say he’s happy but not committing to anything with a girl, but isn’t looking elsewhere either? It that just short-term convenience or?

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They’ve been dating for about 1 year and see each other every couple of weeks or so for a few days due to a little distance.
Why would a man say he’s happy but not committing to anything with a girl, but isn’t looking elsewhere either? It that just short-term convenience or?
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