Guy's Behavior

He suggested we add each other on Facebook after five dates; is this a good sign?

He asked me to add me on Facebook after five dates; is this a good sign?

We met via a hinge for the first time on June 18th and have been on dates during the following days; June 25th, July 9th, July 16th and July 23rd, 2022.
Our dates have included dinners, bowling, mini golfing, window shopping, movies and a board game cafe, in which we played a variety of games for over 4 hours, but the average length of our dates is 5 hours.

When he dropped me off last Saturday after our date, he said he would like to go on more dates, and I jokingly said how many, and he said all of them, lol.
He is 26, and I'm 25, and we are both inexperienced in relationships, so just going with the flow, but I wanted to check in to see if this is a good sign or if I'm being too optimistic.

He suggested we add each other on Facebook after five dates; is this a good sign?
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