I totally agree with Svetlana :)

if we are distanced I can send a Valentine Card...

if we are close I gift a present and celebrate somewhere... but actually nothing special... as it s not our holiday after all... it s not so important here...

I think if you re in love you don`t need any causes to celebrate it)) or show your feelings

I don't offer nothing :) I don't need do offer things always is a "special day" as if it were an obligation just because "all persons" do it

Some dates such as Valentine's change country to country...Exemple in almos of countries is on day of 14/02 but in Brazil is 12/06 ...

So for me a good day of San Valentine is go lunch out, karts and target of shots and of end the night go some party :)

Before Valentine's Day, as a girl, I will make for my BF a hand-made present. It can be a box of chocolates, or simply a card. 

In the evening of Valentine's day, we hang out and eat together, after that go to somewhere romantic or just walk side by side

To me, that is happiness