I am throwing the girl I like her first surprise birthday party! I'm closing down her favorite club just for the party. Her favorite bands and dj's are coming. And i'm thinking of inviting her friends. Do I invite her friends? Coz i have a feeling she won't be spending time with me of I do.

Of course you should invite her friends! It is her birthday party after all. Don’t worry about her not spending time with you. You have all the power in the world to change that. All you have to do is keep approaching her and spend time with her yourself.