An anniversary
A day to celebrate an important event (like getting married)
Engaged
When two people have promised to get married
A groom
A man getting married
A bride
A woman getting married
Chat up
Talk to someone to show that you are interested in them romantically
Flirt with
Touching or talking to someone in a way that shows you are interested in them romantically
Fall for
to fall in love
widowed
a person whose husband or wife has died