Make a mile mark

Buy the best bottle of wine or champagne you can afford. Give it as a gift for a honey moon or first year animosity and write poem in your own words about how your love will only get better with time and some other mushy stuff. Here is the hard part make it last and only drink a small shot for an anniversary and let the wine get better as time goes on along with your love. This is romantic and it let's her know you are in it for the long haul and gives you both something to look forward to.