Look around you the next time you're in town or at the mall. Do you see any obese, old men? You won't, because they're all dead.
You can bring candy and roses, but if you really want to touch your sweetie's heart, give her a half-hour of openly and honestly sharing your feelings about her and the relationship.
A therapist friend of mine once said that advice is the lowest form of conversation. I would go even further in warning that giving unsolicited advice is a sure way to erode trust and drive people away.
The next time you talk with a friend, consider looking at that friend with beginner's eyes. You might notice some pretty terrific positive changes if you're willing to see your friend anew, as he or she is, right now.