You already have many recommendations here, but I will add my list as well. (Maybe it will make it easier for you when you see titles recommended by more than one person. And the "recommend me something" question is so hard to resist!)
Love Shuffle
http://mydramalist.com/115-love-shuffle (friendship, comedy, romance)
It’s a really good one!
Orange
Days
http://mydramalist.com/264-orange-days (friendship, romance) Not comedy
but a great, warm story, the actors have chemistry! If you hang around a little
longer, more people will recommend it for sure!
Saigo
kara nibanme no koi
http://mydramalist.com/3156-saigo-kara-nibanme-no-... (friendship, family, romance) This
is a very fun, lighter drama, similar to Date in the way that the main
characters don’t get along very well at first.
Slow
Dance
http://mydramalist.com/987-slow-dance (friendship, romance) If you like
Orange Days, you will like this one, too.
Last
Cinderella
http://mydramalist.com/6527-last-cinderella (romance) I know some people don’t
like it but I really enjoyed it!
Amachan
http://mydramalist.com/6182-amachan It’s a long drama but each episode is only 15 minutes! It has a little bit of everything,
almost!
Other
good dramas that are not exactly what you are asking for but worth checking out
anyway:
Bambino!
http://mydramalist.com/126-bambino (life, friendship, food)
Biblia
koshodou no jiken techou
http://mydramalist.com/5996-biblia-koshodou-no-jik... (friendship, investigation, books!)
Koukou
kyoushi 2003
http://mydramalist.com/790-kou-kou-kyoushi-2003 because it’s great and I always recommend it to everyone!