St Valentine

How is it that this day 14th February has become synonymous with romantic love?
Apparently there have been 14 martyred saints of this name of which nothing is known.  One Valentinus, was martyred and buried at the Via Flaminia, outside of Rome on the 14th February and his name means worthy, strong and powerful  -  is that he?
 The St Valentine we celebrate today could be one of the 14, one was a priest in Rome, one a Bishop at Interamna and we know little or nothing of the others.   This Feast Day is not actually recognised by the universal Church nor by the Orthodox Church and it is thought that Geoffrey Chaucer and his followers first associated Valentine and romance in the 14th centuary.
However, he may not be a recognised Saint but as one Pope said....
'He whose name is justly reverenced among men  may have acts known only to God'
Happy Saint Valentine's Day.