You're only 10 this isn't something you should worry about yet. I guess you could try talking to her or do something extremely amazing. For a 10 year old that is.
If she really love and has care to you she will go back. Don't get it serious . Enjoy life in any activities, and don t depend your happiness to people that made you unworthy. Your too young to think of it deeply.
Kid,if she dumped you for that it tells me her heart is bad and you should "dump" her.Besides you are too young to worry about a girl friend.Sounds like she is a spoiled brat needing her parents to spank her more often.