Before my brother was loving me a lot daily he used to call and ask about what I did in whole day,he used care me a lot.but now he got a girl child alhamdulilla, I am so happy for her tooo.but now he wasn't tke care of me like as he before.he used to ignore me.I even feel like cry.but I feel scare of allah,because whether what I am doing is hasad or what.I want peace in me,even I spoke to allah.so can you tel me what I am doing is hasad or what

It is ghibtah. See #3 in this link:

https://islamqa.info/en/105471

3 – Where he wishes for himself a blessing like that which someone else has, without wanting it to be taken away from the other person. This is permissible and is not called hasad rather it is called ghibtah.

You miss the closeness you had with your brother. Be patient. It will be restored, plus your joy and love will also be for Alhamdulilla -- and hers for you.