I miss you so much and I would to like explain everything about the school and what alleverything that happend without you.

First you havare right, my parents are disvorced m. My dad has cheated on my mom and I and my mom are so happly.y to see him gone.

If he "cheated your mom" it might mean he tricked her out of money or something.
If he "cheated on your mom" it means he slept with another woman.

My dad was really bad and my mom see finally hersaw his true face.

He can cooks and cleans and he helps me with my homework.

Or "he can cook and clean and he helps me with my homework."

His name is Tom, he is a doctor.

But the school is terrible m. My boyfriend broke up with me for lLisa, the meansest girl in the school .

All wWhile she is so beautiful and the captain fromof the chearleder team.,

That is not fair she is also evil and selfish but it is the school from her father. But her father owns the school so I can not do anything.

the "while... also..." needs to be part of the same sentence.

But great news, I will be a big sister b! My mom is pregnant the rest come later .!

I don't know what "rest come later" is refering to.

You can use exclaimation marks (!) to show excitement or anger, just like how question marks (?) show a questioning tone.

Bye lLisa

Names should always have the first letter capitalised.

I miss you so much and I would like to explain everything about the school and what alleverything that happened without you.

Firstly, you havare right m. My parents are disvorced, my dad has cheated on my mom and I. Me and my mom are so happly.

My dad was really bad and my mom see finally hersees his true face.

But that is not all, my mother married again.

He can cooks, cleans, and he helps me with my homework.

His name is Tom, he is a doctor.

But the school is terrible, my boyfriend broke up with me for lisa, the means girl in the school .

All while she is so beautiful and the captain fromof the cheaerleader team.

That is not fair, she is so evil and selfish but it is the school from her father, I can not do anything.

But great news I will be a big sister b, my mom is pregnant, the rest will come later .

Dear Lisa,

I miss you so much and I would like explainto tell you everything about the school and weverything that allhas happened without you.

First, you havare right my parents are disvorced my dad has cheated on my mom and I and my mom and I are so happly.

My dad was really bad and my mom see finally hersees his true face.

He can cooks, cleans and he helps me with my homework.

But the school is terrible my boyfriend broke up withleft me for lisa the means girl in the school .

All while she is so beautiful and the captain fromof the cheaerleader team.

ThaIt is not fair she is so evil and selfish but it is the school from her father's school I can not do anything.

But great news I will be a big sister by mom is pregnant the rest will come later .