Hello !

I have onea little brother.

When we are onlyalone together, we are so cutvery nice towards each other.

But when we are with our parents, he his so eannoying !

He putspends all of his time to critisize me to jocke, but everytimecising me, joking all the time and it's tiresome !

It's becauseSo, I'm sovery happy when he his not here ahahah.

So, my relationships with him are, in the majority of the time,is on the whole bad... but no,t very bad. or terrible

But, sometimes, we find commun pointthings in common, like a film that we liked or an activity wich we want to do.

InAt therose times it's pleasangreat.

My bBrother

Titles follow special capitalization rules

Hello !

There are no spaces before question or exclamation marks

I have onea little brother.

Our relationships is very strange.

When we are onlyalone together, we are so cute towards each other.

I might suggest "sweet" instead of "cute" here

But when we are with our parents, he his so eannoying !

But I mean really !

"But" is not used so much for emphasis like "mais" is in French

He putspends all (of) his time to critiscizeing me to jocke, but everytime it' around, but it's always tiresome !

This "of" is optional. When you are kidding someone / being silly, it can be described as "joking around"

IThat's becausewhy I'm so happy when he his not here, ahahah.

For posterity, of course we would not spell out laughter in formal writing, but it's a very normal thing to do in general on the internet

So, my relationships with him are, inis, the majority of the time, bad... no, very bad.

"Most of the time" would be a bit more natural than "the majority of the time"

But, sometimes, we find commun poina shared interest, like a film (that) we liked, or an activity which we want to do.

A "shared interest" would be more natural to say than a "common point"

InDuring therose times, it's pleasant.

Goodbye !

Our relationships is very strange.

When we are only together by ourselves, we are so cute towards each other.

But when we are with our parents, he his so eannoying !

He puts all of his time to critiscize me to jocke, but everytime it's tiresome every time!

I'm not sure what you mean by 'to jocke', so I'm not sure how to correct it

It's because I'm so happy when he his not here ahahah.

So, my relationships with him are, inis, the majority of the time, bad... no, very bad.

But, sometimes, we find commun pointthings in common, like a film that we liked or activity which we want to do.

In therose times it's pleasant.