Although I see this word multiple times a day, I never search looked up its definition until one of my girlfemale friends ( not girlfriend) told me that I was a commitment -phobice.

Calling someone your "female friend" when talking to other people to avoid confusion with "girlfriend" is pretty common. You can add "phobe" onto the end of a word to as a description of someone who has a phobia. However, it sounds pretty informal and slangy in writing. "Afraid of commitments" might be better depending on how formal you want to sound

I've always wondered why did I always get cold feet when things started to get real, why did I and run away like it's a house on fire.

BIt's because I am afraid of commitment.

I am afraid of this relationship things.

Let me break it todown for you.

I am 21, by the way.

Let's say If a relationship has workeds out, I have to spend rest of my life with only one girl, o. Otherwise it is a break up, which means everyone gets hurt.

Starting a sentence with "Let's say" before describing a hypothetical situation is pretty common and natural sounding in spoken English, but also sounds a bit slangy and informal when in writing.

It is a double -edged sword for me.

See, the problem is that I want to catch bigger fish but just when I thought Iink I've found one , the first thing I do is start looking for red flags and flaws.

I eventually ghosted them and feel like a jerk.

Investing my time oin another person other thanbesides my family members or friends seems like a waste.

Although I hate dramas, I do care about people and their emotions but I just can't bring myself to commit to just one girl.

The idea of dying alone really does scare me, though.

Maybe I just haven't found the so called "one" like in a typical romance movie.

Anyways, I am focusing on other things for now.

Let me breakexplain it to you.

Let's say If a relationship has workeds out,. I would have to spend rest of my life with only one girl, otherwise it is af we break up which means, everyone gets hurt.

Maybe I just haven't found "the so called one" like ain typical romance movies.

Although I see this word multiple times a day, I never search looked up its definition until one of my girlfemale friends ( not girlfriend) told me that I was a commitment phobictold me that I have a fear of commitment/I am afraid of commitment.

Using "female" instead of "girl" eliminates confusion.
I've never seen phobic attached to the end of an English word, although I wont say it's not done. That being said "to have a fear of commitment" or "to be afraid of commitment" are common expressions.

I've always wondered why did I alwaysI get cold feet when things started to get real, why did I run away like its a house on fireand why I run away when things start to feel real.

Just sounds more natural to me

BIt's because I am afraid of commitment.

I am afraid of thiserious relationship things.

Let me break it todown for you.

break it to = tell someone about bad news (The dog had died and the parents needed to break the news/it to the kids)
break it down = explain (These dance moves are a little complex, so let me break them down for you)

Let's say If a relationship has workeds out, I have to spend rest of my life with only one girl, o. Otherwise it is awe break up which meansd everyone gets hurt.

It is a double -edged sword for me.

See tThe problem is that I want to catch a bigger fish, but just when I thoughtwhenever I fouind one , the first thing I do is looking for red flags and flaws.

Using "see," at the beginning is more appropriate for casual conversation. I haven't often seen it in writing (even informal).

I eventually ghosted them and feel like a jerk.

Investing my time inton another person other than my family members or friends seems like a waste.

"to invest in(to)"

Although I hate dramas, I do care about people and their emotions but I just can't bring myself to commit to justonly one girl.

Maybe I just haven't found "the so called one like aOne" that all typical romance movies have.

Anyway, I am focusing on other things for now.