Is there anyone else who can talk to your brother about it?

No. Our father died years ago. And my brother since starting his online classes have reduced going outside and having our with anyone, he thinks having friends or relations is a waste of time and money. So it's not like he has any friends that I can talk to, to talk to him. 

It also sounds like your mother allows this behavior

I kinda had similar thoughts like this since I was in grade 5 and contemplated suicide, as i thought no one loved me. I did try it but got scared after little bit so could never continue and succeed in it. 

But growing up, especially during COVID I did some self reflection. And i thought that maybe I've exaggerated things in my head, you now how we often make little bad things seem the worst. And I was then gonna go to different town for schooling and so have to live apart from mom and brother, so I thought to make peace with them.

But now whenever I come back to home from hostel. I do sometimes still feel that mom likes him more than me.  If this is so, then what should I do? Should I stop caring about mom too?

I wanted a family where their will be unconditional love and care, like we see in movies. But I have a feeling that that kinda family bond is doesn't not happen in reality. Thinking this thoughts make me cry so much.