Me, I consider myself a very emotional person.

But has also affected my self esteem in the past because I used to base my self esteem on how people feel or think when beingthey are with me.

That is good, but at someonly to a certain degree.

I'm not saying she doesn't have emotions, it's just that she keeps them to herself.,

and that's what I want to understand more to help her when seeing her sad or unmotivated.

My sSister

When she was too cold II'd always feel as if she lack ofed emotions in her.whenever she gave me the cold shoulder

"Cold shoulder" is a figure of speech that shows that she

However, at that same time, she cwould cry alone when beingever she became too frustrated.

It was ahad truly puzzle tod me.

Me, I consider myself to be a very emotional person.

I cwould cry a lot whenever seeing an emotional video on there in internet or tear-jerking scene in a movie.

Also, II also used to cry whenever someone yelled at me angrily, or when things weren't going my way.

Now, I don't cry that much, but other's emotions always affect me.

With thatIn short, I mean to say that I'm a very empathetic. person

Just a stylistic change :D

ButHowever, this has also affected my self esteem in the past because I used to bas, since my self -esteem would fluctuate based on how people feel or think when being with me.

That is good, but at some degreeHonesty's usually a good thing, but there's always a limit.

aAnd that's why I want to understand her more: to help her when seeing her sad or unmotivated.ever she's sad or feeling discouraged).

My sSister

When sShe was too cold and I always feelt a lack of emotions in her.

However, at that same time she could cry alone when being tooshe was frustrated.

Me, I consider myself a very emotional person.

I could cry a lot when seeingwatching a movie or an emotional video on there in internet or a movie.

Now, I don't cry that much, but other's emotions of others always affect me.

But has alsIt used to affected my self esteem in the past because I used to base my self esteemit on how people feel or think whilen being with me.

I replaced the second "self esteem" with "it" to avoid repeating.

When I'm interacting with my sister, I can sayense that she doesn't care about how others feel the way I do.

For example, Sshe sometimes can say something toooverly honest to me or my little brother.

That is good, but ato some degree.

and tThat's what's I want to understand more to help her when seeing herhe is sad or unmotivated.

Before, I just didcan't understand her at all.

Because you still cannot understand her, it should be present tense.

When sShe wais too cold and I always feel a lack of emotions in her.

However, aAt that same time, she could cryries alone when being too frustrated.

It waShe is a puzzle to me.

Me, I consider myself a very emotional person.

You don't need Me since I means the same thing.

I could cry a lot when seeing a movie or an emotional video on there in internet or a movie.

I reversed the order just to make it a little more natural to read.

Also, I used to cry when someone yelled at me angrily or when things weren't going my way.

You don't really need angrily here as it is implied by yelled at.

With that I mean that I'm very empathetic.

ButThis has also affected my self esteem in the past b. Because, I used to base my self esteem on how people feel or think when being with me.

For example, Sshe sometimes can say somethingbe too honest to me or my little brother.

be would a little more natural here.

That is a good, but at thing, but only to some degree.

and that's I want to understand her more to help her when seeing herhe is sad or unmotivated.

My sSister

Title capitalization rules

When sShe was toocold; I could I always feel a lack of emotions in her.

No need to say "too" cold since cold is already a strong term to call someone. Saying she lacked emotion/empathy is basically just repeating that she was cold, so I framed it as such with the semicolon.

However, at that same time, she could cry alone when beingshe was too frustrated.

MAs for me, I consider myself a very emotional person.

We never really begin sentences with "Me, I" in English. But you could say "as for me."

I could cry a lot when seeile watching an emotional video on there in internet or in a movie.

Also, I used to cry when someone yelled at me angrily or when things weren't going my way.

No need for "angrily," the words yelling at someone already implies anger.

Now, I don't cry that much now, but other's emotions of others always affects me.

More natural

But it has also affected my self esteem in the past because I used to base my self esteem on how people feel or think whilen being with me.

Since you're speaking in the past tense, there's no need to add "in the past." But if you want to say that it affected you before and no longer does, you could say "it used to affect my self esteem."

When I'm interacting with my sister, I can saytell she doesn't care about how others feel the way I do.

For example, Sshe can sometimes can say something too honest to me or my little brother.

That is good, but ato some degree.

and tThat's what's I want to understand more to, so I can help her when I seeing her she is sad or unmotivated.

Generally you want to avoid beginning sentences with "and."

Thanks for reading.

Before, I just didn'tI could never really understand her at all.

The original is a bit unnatural.

When she was too cold I alwayswould feel a lack of emotions in her.

However, aAt thate same time, she could cry alone when beingshe was too frustrated.

"However" is redundant.

Me, I consider myself a very emotional person.

Redundant

I could cry a lot when seeing an emotional video on there in internet or in a movie.

WithBy that I mean that I'm very empathetic.

ButThis has also affected my self -esteem in the past because I used to base my self esteemit on how people would feel or think when beingthey were with me.

That is good, but at someonly to a certain degree.

and that's I want to understand more to help her when seeing her sad or unmotivated.