How do I get my brother whose 4 years older to wanna fuck me?

I think there is still a large Taboo between familymembers. Thats why they are afraid to start a sexual relationship. But this Taboo is from over 100 years ago. Today there's no reason any more not to have sex with someone of your Family.

He doesn't see you as sexual .... Yet!
Make him more aware, go braless and let him see some nipples. Leave you of your worn panties in the bathroom when you know he is going in after you. Leave your door open a bit and accidentally flash him......you will have to fight him off....

I don't think you would have try very hard.

Spend the night wit him, get naked in his bathroom and come out and fuck his brains out. Do it when you know he's in bed.

Alcohol and porn? Drunk horny guys will fuck anything.

I can try but hes not always at my house

Go to his house