How can I make my smile, especially my teeth, look bigger and wider? (photos)

Whenever I smile, my upper lip just covers up most of my front teeth and I end up looking like tooth less. It frustrates me because when I see my photos, I really look like I don't have teeth and my classmates say that whenever I talk, it looks like i need dentures and I hate it. And I also hate it whenever I open my mouth a little, there is no teeth showing. I want my bunny teeth to show up. I hope you could help me. Thank you!