Have you tried leaving a message to someone?

Hi there [이름] Ro!

Thanks a lot for accomplishing your homework!

You did really great. I always appreciate your effort. I hope you\'ll never get tired of doing your homework 

and improving your writing skills.

Have a great day!

Here are my corrections for you!

~T. Eunice

I like messages and letters because of its analogue features.

>> Correct

Or>> I like messages and letters because these are personalized.

That\'s the reason that I leave messages or send letters to my old friends and my old pals.

>>That\'s the reason why I leave messages or send some letters to my old friends.

But in all the letters that I have received, there is a letter that I can not forget.

>> Correct

Or>> There is one letter that I cannot forget.

The letter came from the past by my ex-girlfriend.

>> The letter I received came from my ex-girlfriend.
In my 20s, I had a really hard time to survive.

>> On my 20s, I had hard time to survive.

All the circumstances that surround me was negative to me.

>> All the circumstances that surround me was a negative.

My family got an economic difficulty, and my job was not going well.

>> My family got an economic difficulty and my job was not going well.

I was losing my own positive side, brightness and optimism.

>> Correct

Before the hard time, I was a optimistic and enthusiastic person.

>> Before things get tough, I was an optimistic and enthusiastic person.

I always went out with many friends, and I was always a leader in them.

>> I always went out with my friends and I am always a leader to them.

The ex-girlfriend was a member of my friend group and she was the most beautiful and bright girl in them.

>> My ex-girlfriend was a member of my friend\'s group and she was the most beautiful and the brightest girl among them.

We loved each other and could become an idealistic couple.

>> We loved each other and we can be an ideal couple.

But during the hard period, everything was changed. I cannot talk my hardship to her.

>> But during the hard time, everything was changed and I cannot tell her about my problem.

My pride didn\'t allow me to talk my difficulty and my feelings about that to other.

>> My pride didn\'t allow me to talk about my difficulties and my feelings to others.