How should I talk to my partner about me not feeling comfortable in myour relationship because I’m completely out of my comfort zone?

our relationship not my, because the two people in the realtionship share it.

This sentence isn't gramatically incorrect, however, they phrasing feels a little strange.
Maybe: How should I talk to my partner about not feeling comfortable in our relationship? I always feel like I am completely out of my comfort zone.

Seriously，, I feel very worried after watchreading your story withabout your boyfriend.

You should use the verb reading. Watching is the verb we use when something is happening in front of us - I watch a movie, I watch tennis, I watch people walk down the street. Reading is for when we are looking at words

There is a golden rule for relationships:” "You should leave if you feel you are not yourself when you arile in your relationship."

What you wrote is not wrong, however, this correction feels more natural.

“ We are always independent all the time, no matter whatever happens, because we should feel comfortable and happy when we are freal and freee to be ourselves.

The meaning of this sentence is a little unclear. I have corrected it to what I think you mean, sorry if I have missunderstood you. Let me know if you have any questions about this correction.

From your story，, I believe you have loste yourself when you are with your boyfriend together，, and you are unhappy and stressed.

Dear, wWe can’t spend 80% of the time of our lives with others except ourselves because, this is not a balanced mode of our lifestyle.

You don't need to say others except ourselves, this is because others shows that you are talking about people apart from yourself.

We will eventually feel resistant and uncomfortable when weto spending so much time with others no matter who they are.

Use eventually to show that this may not happen at the start, but it will happen.

Human beings are certain ones who love solitude but also can’t survive without being social.

Use also to show that even though one thing is true, another thing is also true

Furthermore, we need to find the most suitable model and lifestyle for being people wholifestyle so we can enjoy life.

Just leave the people who make you feel uncontrolledpowerless and uncomfortable all the time.

Uncontrolled would be a positive word in this case - it would mean you had freedom.

On the other hand, yYou should leave your boyfriend and say “bye-byesayonara”.

On the other hand implies the advice you gave before is different to this advice, but it is not. "bye-bye" is not the most appropraite choice here it make is sound either sassy (sassy is kind of like rude but has a certain nuance to it), or childish.
I think that "sayonara" is the tone you are trying to have. It is a Japanese word originally but English borrows it frequently. It is used as a different way to say goodbye but I often think it is used more when we say goodbye to something and we are relieved it is gone.

1. leave the man as soon as possible. You should be yourself rather than a girlsomeone who sacrifices herself for ther man all the time.

Girl we would only really use to refere to someone younger than an adult. In this case I would naturally think the person writing the original question was an adult.
Instaed of man you could also say boyfriend or partner.

You will feel comfortable and peaceful, even if you will feel so sad and emotional after you brokeeak up with the manyour boyfriend.

Boyfriend is a better choice than man in this sentence.

From your story, I can tell you are a nice girl with meaningfull goals.

You should exercise more if you enjoy working out inat the gym.

We would say working out at the gym. I know in the gym makes more sense gramatically, however, we would always say at. I can't explain why because I don't know why, it is just a weird English thing.

You should study more knowledge and spend more time in the school if you want to focus on your education.

You don't need to say knowledge because saying studying implies you are gaining knowledge.

Maybe you will get athe chance to get into a Top university.study your passions at an even higher level.

I am unsure if the post said whether she was in highschool or older, however, I believe the author would already be in university or atleast have graduated highschool. Since the author says she has free days during the week (monday-Friday) she could not be in a normal highschool because highschool students do not get regular days off of school - at least I have never heard of this.

Because of this I would suggest changing this sentence to reflect that she may be at university.

At least you will broaden your view and think of things withhorizons and gain more perspectives.

Broadening your horizons is an English idiom - it essentially means to experience new things.

3. Spending more time with your parents because they are getting older accompany with you are getting maturefamily.

This sentence gramatically is okay, however, I would change it. Because you do not know the person you are talking too, you do not know if their parents are still alive, because of this I would suggest changing the sentence to my suggestion. This sentence is more inclusive for people with different family structures.

Don’t ignore those people you really shouldshould really cherish and care about.

I hope you are doing well and it can help you.that my suggestions are helpful.

Or you could combine this sentence and the above sentence to make
The above are my suggestions, I hope they can help you and I hope you are doing well.