give her a gift made by yourself . She will really happy for that. Besides , the sentence"i want give her a big suprise"should be "i want to give her a big suprise"

You know her much better than us so, you can easily find the way to surprise her. However, I could tell you how I'd act in a similar situation with my best friend. She likes simple things, she likes my drawings and poetry for her so, probably I'll make a birthday card for her. Then, I'd buy her a perfume or a really original T-shirt or make up or something I know she is always buying for herself. Then, I'd hang out with her at night or we'd go to the cinema and play bowling or tejo. Then, I'd stay at her house to sleep there that day, and we'd spend all the rest of the night talking about nonsenses and taking silly photos for her Facebook. xD P.S. Simple things are always the best ones. The main point is you are there with her. :)

Hi, I would give her a 'surprise party'. Ring all her friends, ask them to bring a present and some food and get them to come to your house. Tell your friend that you have made her a special meal at your place. Then when you get to your place all her friends can shout "SURPRISE" and have a party.

you know what surprise just made me think of 'katy perry---l kissed a girl' kidding~~~ maybe a embroidery will work

Hello dream_nana, 'my best friend will be birthday' is a wrong sentence . You better say: "My best friend's birthday is coming soon."