For gifting something unique while celebrating your wonderful years of togetherness, you can pick any of the following ideas:
1. Create and Customize Your Own Plaque: A gift that is custom created is always special, especially if it has a sentimental touch and spin to it. For this type of gift you will want to select a cherished photo of you two and get it converted into a wooden plaque with a quote that expresses your unique relationship.
2. Personalized Cushion: If you are looking for a very romantic and emotional gift, then gift her a personalized cushion with something you said that made her smile.