While I am far from a romantic (or so I believe) it has nevertheless been a difficult day for me and I suspect, for any of us who has loved and lost a partner/spouse/lover in the recent past (however you define "recent."). My sense of loss caught up with me today and has doubled.
In this household - although there were roses in the early years - and always cards, no matter what -- Valentine's Day always got mixed up with Marty's birthday. We rolled the 14th into the 18th and went out to dinner on the 18th. Marty picked the restaurant (ordered lobster if it was on the menu) and it was the one time a year that I picked up the check. My birthday gift to him.
When he was 82, Emma was his birthday present and we were at the hospital. I don't remember anything about dinner -- I think we postposed it for a day.