What should i say to this girl i realy realy like?

so i like love this girl in my cl and i think she likes me like im 11 and at my school i have recess and theres these things there called flip bar and everytime i go on there she will go on there if she sees me on there and she says want me to show you new flip so i get in postion and then she comes behinds me at kinda pushes me to show me the flip and when i had my 5th grade celebration i sat on this bench and i got up and went to use the bathroom and then when i come back she sitting right next to were i was sitting also when i was leaving the 5th grade celebration her mom parked right next to my moms car so when i was waiting for my mom to open the car up she starts walking up to me and then she walks back and starts laughing and smiling at me and i get out of school june 16 and i want to ask her out and have her number but i do not know what to say and i always happy to go to school because i get to see her and please answer i really love her