Is he seeing someone?

Short answer: the cards don't report his private life, and I won't hand you a yes or a no out of them — what they do show is a person who keeps his composure very well, which is exactly why this question stays open from where you sit.

The draw (三牌阵 / three-card, drawn just now):

• Past — Two of Wands, reversed. Something planned or half-launched stalled: plans that were made and then quietly not followed through, or a decision about where he was going that never got finished. That reversed Two is usually about unacted plans, not deception.
• Present — King of Cups, upright. The seat that matters most for your question. Read as what you see from the outside: level tone, calm face, everything kept under control, nothing given away by accident. A King of Cups holds his own counsel and manages what other people read off him — that is a posture, not a report of who he's with.
• Future — The Chariot, reversed. A tendency, not a forecast: if the arrangement stays exactly as it is now, the energy behind it keeps going sideways rather than arriving anywhere. Reversed Chariot reads as unmoved wheels, not a punishment.

The honest conditional: if in the next few weeks what you actually see keeps matching that King of Cups — same easy tone, same unavailability, no plans of his own surfacing — then what you're living is composure without content, and the Chariot stays reversed until something in the visible pattern changes. But if the observable things do change — he names a real time, brings you into a part of his week, tells you something before you ask — then that same upright King reads as someone keeping a clear direction, and with you in it. I can't tell you which of those is true; only the coming weeks of behavior will, and neither reading settles it.

One line the cards don't say, so I will: nothing here is evidence about anyone else. Treat his word and, when you have to, the pattern — not this spread.

Within the next two weeks, watch the next time it happens: the first evening he has to commit to a concrete time or plan with you, notice whether he names it, keeps it, or lets it dissolve into "another time." No asking, no testing, no checking his phone — just that one occasion, which is yours to observe and no one else's to report.

Would you like this saved to your journal, or the spread drawn as a picture?