Choosing a special nickname for your girlfriend in English can be a meaningful way to show affection. Here are some options for you:
1. Sweetheart
2. Darling
3. Angel
4. Honey
5. Love
6. Baby
7. Princess
8. Sunshine
9. Beautiful
10. Sweetie
Remember, it's important to choose a nickname that both you and your girlfriend feel comfortable with. It should reflect your relationship and communicate your love and affection for each other.