Give flowers. Sacrifice plant life in the name of your love.
Consider watching a romantic movie together. Suggestions include You’ve Got Mail, Shakespeare in Love, and Diehard 3.
A sword. They’re not only romantic, but are also very practical.
Light candles and scatter rose petals. Consider arranging candles in a pentagram formation for maximum romance.
Plan a date night. If dates aren’t your thing, plan a raisin night instead.
Prepare the finest meal from scratch. Pour your heart into it. Pour your sweat into it. Pour your soul into it. This won’t make it more appetising, but it will show that you care.
Give them your heart. Simply carve open your chest and pull it out.
Sing a love song.
Offer up your undying love. Become immortal to fulfil this promise.
Write a romantic poem.
Serve their enemies’ head on a platter.