Is it normal to like your own brother?

Lately I(17m) think I’ve felt kind of attracted to my brother(5m) I’ve caught myself staring at him while he plays on his tablet and I can’t help but feel these feelings towards him. I’m worried I won’t be able to control these emotions. I feel so horribly ashamed about it This is not a joke this is very serious.

Please real advice only

Please take this seriously

Again I feel incredibly ashamed as it is I know it’s wrong