Most of the Judd Apatow films, especially The 40 Year Old Virgin (which is both lovely and hilarious, despite the betraying title) and Superbad.
Juno was pretty great.
Zack and Miri Make a Porno made me laugh far more than I expected it to. You may wanna also cycle through the other Kevin Smith films if you've missed them.

There's probably loads others but I'm really fucking late and shouldn't be posting on the internet right now. I'll think of more later.