Is he waiting to accept my friend request on purpose?

2 days ago I met 2 nice guys (friends) at a bar and I ended up with them. While talking I became closer to one of them who was very nice and open.
He paid me a drink, wanted me to continue the evening with them in another bar after but I had to go because it was already late. He asked my Instagram twice. There was clearly a connection.

2 days after (a bit less) he still didn’t accept my friend request. Do you think it’s on purpose, waiting a bit or?

Is he waiting to accept my friend request on purpose?
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