How about I not hang out with my little sister?
That is kind of surprising to hear. Why don't you want to hang out with her?
I love her very much, but it's boring to be with her. I also want to have a little fun by myself
It's good that you love your sister. It's also ok to want some alone time sometimes. If you hang out with your sister some and spend time alone sometimes as well, that is a good compromise.
No, I'm going to shoo her away and make her cry.
If you want some me time that is fine, but also spend some time with her as she will remember this when she gets older. But please never want to make her cry, I feel that is grounds for mental illness if you do that. Seek mental help and maybe you can find out why you feel this way.