HELP!!!:with my super cute crush?

I Love this guy and I need a super cute outfit to wear to his house. I am having a sleepover with his sister and I need a pair of PJ's and an outfit to wear there. I also need one for my birthday party that he and the rest of the cute guys and my friends are coming too. It has to be age appropriate and I am a preteen/teenager so..... I also need a back to school outfit that will bring attention but it has to have straps.... Other then that it could be anything. Please only give advice and or describe what I should do or wear or where to shop but I will mostly enjoy pics so I can actually pick something easily the best pics gets my best answer award!!! :] :] :] please help with my other quetions too! thanks!