Plz Plz Plz Plz Help !!!!!!!!!!!!?

Today i was playing at my friends house we had pizza and had fun.So later on i got finished with my water so i threw my water bottle at these annyong kids who would not leave. But i guess i got baaaaaaaaaad aim i threw it down wards when i was supsoped to through it up so it hit her around her eye so i thought she was laughing so i did but her face got red and she started cyring (frist time i saw her cry) then after that she ran in her apartment and we looked 4 her she came down and said looking 4 me with a attuide and ran back up staris so i went home so what should i do