New relationship and it’s his birthday!

So I just started seeing someone. We met 6 days ago to just talk and meet in person. Expected to be with him for a couple of hours. Well that date lasted 10 hours!! (1:30 - 11:30 pm) We took a walk by the water, sat along the waterfront talked, went to get a couple of afternoon drinks, which led to dinner, then a car ride and ending up at a park that overlooks the city. We had great communication and s great connection. The physical attraction is certainly strong. He told me he never made out with someone as long as we did, lol! So ended up seeing me again 3 days later and yes we have been intimate. We have texted everyday. So his birthday is in 5 days. He doesn’t know I know it’s his birthday. My thought is to just take him for dinner. What are your thoughts or suggestions?

Thanks!