His body language in public?

So my boyfriend and I were on line waiting to buy ice-cream. We were holding hands. There was a lady waiting, a few people in front of us. I saw him look at her at a few times, and he smiled to himself. She was attractive.

After she made her purchase, she walked past us and left. My boyfriend and I (still holding hands) then walked foward in the line and he put his arm around my shoulder as we continued walking.

I know I’m probably looking too much into his body language… But could it mean anything if his body language, changed once it seems that the attractive lady left our sight?

His body language in public?
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