Please help guys

[Ilovegrant12]

I have a 3 year old girl and a 18 month little boy. Times have been so hard lately as my little girl always wants to play with his toy and goes so close to his face and shouts which makes him angry and he hits. I dont know what to do because he is so young and i cant teach him about sharing so young but my little girl just dont listen and always annoys him. Im finding it so hard. He gets so frustrated and hits and nothing seems to calm him down

What things have you tried so far to try and stop her annoying him?

She’s old enough to understand that he’s smaller than her and doesn’t know how to share.
Encourage her to play nice and if she is being aggressive I would be giving her a timeout .

I think you're looking at this the wrong way - the issue isnt that you son is getting cross and frustrated, its that he's being picked on by his sister. You need to lay down firm rules for her and enact consequences when she breaks them.