I've been known him for 34 years.

I met him when I was (at/in) elementary school.

Until graduating junior high school student, I groew up with him.

My parents' house and his one is very neahouse are very close to each other.

It's about 5 minutes to get to on foot.

I'm shy and, a bit blunt, and kind.

He is ambitious, and a bit nosy.

Now, he works as a sales person at a steel trade company.

I've been known him for 34 years.

I met him when I was atwe were in elementary school together.

UWe grew up together until we graduatinged from junior high school student, I grow up with him.

or

We grew up together until we graduated from junior high school.

MHis and my parents' house and his one is very neames are very close to each other.

His and my parents' houses are very near.

The character isOur personalities are completely different between me and him.

or

My personality is completely different than his.
His personality is completely different than mine.

I'm shy and, a bit blunt, and kind.

He is ambitious, and a bit nosy.

Now, he works as a sales person at a steel tradeing company.

やっぱり。

My Childhood Friend

I've been known him for 34 years.

I met him when I was atin elementary school.

UI grew up with him until I graduatinged from junior high school student, I grow up with him.

My parents' house and his one isare very near each other.

The character isHowever, we have completely different between me and himpersonalities.

I'm shy and a bit blunt, andbut I think I'm also kind.

He, on the other hand, is ambitious, and a bit nosy.

Now, he works as a sales person at a steel trade company.

I've been known him for 34 years.

I met him when I was atin elementary school.

Your sentence makes sense, but it's a little improper.

Up until graduatingour junior high school studentgraduation, I groew up with him.

My parents' house and his one is very neaare very close to each other.

You can also say:
"His house is very close to my parents'."

The character isOur personalities are completely different between me and himus.

I'm shy and, a bit blunt, and kind.

He is ambitious, and a bit nosy.

Now, he works as a sales person at a steel tradeing company.

I've been known him for 34 years.

I met him when I was atin elementary school.

If you both are around the same age, it would be better to say "I met him when we were in elementary school".

他の伝え方：
"I met him when I was an elementary school student."

Until graduating junior high school student, I grow up with himI grew up with him up until my junior high school graduation.

For some reason, both your initial sentence and my correction sound like you stopped growing up together after graduation to me. Maybe something like "We grew up together even through my junior high school graduation" can work as well.

My parents' house and his one isare very near each other.

他の伝え方:
"His house is near my parents' house."
"My parents' house and his house are close by each other."

The character isOur personalities are completely different between me and himfrom each other.

Using "character" here sounds strange.

他の伝え方:
"His personality and mine are completely different."

I'm shy and, a bit blunt, and kind.

The extra "and" isn't necessary here.

He is ambitious, and a bit nosy.

Now, he works as a sales person at a steel trade company.

My Childhood Friend

I've been known him for 34 years.

I met him when I was atin elementary school.

Until graduating junior high school student, I groew up with him.

My parents house and his one isare very near.

TheHis character ishas become completely different between me and him.

I'm shy and, a bit blunt, and kind.

He is ambitious, and a bit nosy.

Now, he work as a sales person at a steel tradeing company.