Just take a chance.

Nobody’s perfect, right? We all make mistakes that we can regret later. It’s in people human nature, as we don’t really know what’s going to happen next after we make a step forward. It maybe something good things or but something bad as well. The point is to have the courage to overcome that bad luck and still have the faith in better days which will definitely come.

But However, we cannot forget the past, because we are who we are due to things that happened to us earlier. If they hadn’t happened at all, we would have been (we would be) totally different people. So, we should keep in mind people that were beside us then. We should remember the people who were in our lives. It doesn't No matter if they were friends or mere acquaintances just accidentally encountered person – as long as they had an influence on us we should remember them.

And What if we’ve lost contact with them? What if we want to renew acquaintance with them but we’re not sure if they want it too? Don’t be shy. Don’t be afraid. If you try and promise yourself you’ll work hard this time, it work out. The point is to do what YOU really want to do even if other people have opinions that are different from yours. It’s your life. You’re the only one who may regret things that could have been different if you only had done something. Just take a chance.

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Excellent job! 

Notes:

blue: alternative / alternatywa

"But"/"However."  In casual spoken English, we often start sentences with "but" and "and" - this is fine.  In written English, we should not start a sentence with a conjunction ("and", "or", "but"). In written English, we should use a different word to start a sentence (examples: "Furthermore", "However", etc).