How long should I wait to accept his friend request?

melmel4ever
I really like him and I've known him for 10 months now. Last day of the semester and we walked to our cars. So he's been wanting my FB, but I kept forgetting. So yesterday I finally told him okay. It's 4 in the morning here, I don't when I got his request but he sent one with also a message. I didn't check message yet, lol... kinda scared. So when should I accept? I don't want to come across as too eager or too cocky.
Updates
+1 y
Alright, so I finally did add him, yay! Thanks to those who 'actually' helped, it's most appreciated! :D
How long should I wait to accept his friend request?
10 Opinion