This is a common situation that usually happens all around us.

We often feel a little bit heartour heart skip a beat when we meet someone who is our type.

"heart skip a beat" is an idiom we say when you see someone you love, or you are excited. Equally we can use it when we are scared, but it is most commonly used to mean seeing someone you love.

We have a lot of times of heartbeats in our lifemay expereince this a lot, but we don’ not need to get with those nice people together.

Instead of repeating heartbeats, use this to show you are talking about "heart skipping a beat" which you talked about in the above sentence.

Do you drop offgive flowers too every time whenone you think they areis pretty?

We give flowers to people. If you said drop off it makes it sound like you give the flowers to someone and then leave straight away. For example: I will drop the flowers at your house before we go to the party. Let me know if you want me to explain this any more.

DoWould you swim on seas every time whenacross the ocean for everyone you think they areis beautiful?

This does not make perfect sense. I think it may be an idiom in your native language you have tranlsated to English, but the meaning is unclear. I have changed it to an English idiom: to say you would swim across the ocean for someone is a way to show you are dedicated to them.

Also, dDo you get with people together wheneveryone you think they areis nice?

The wording I have used matches the rest of your writing better.

We can’t give up our real treasure forn our important relationships too pursuinge something new.

We can’t break up with ourthe partners whoe truly love us because we find someone new.

This sentence means that only your partner loves you. For the argument you are making to be strong, you should change it to show you love your partner.

You will feel boring even if you get into a new relationship someday because every relationship is like that.Eventually your new relationship will feel boring, that is how all relationships work.

This wording is more natural

Don’t follow thefleeting feelings, follow theyour heart.

fleeting feelings lets the reader know these feelings will change.

The trulyrue love usually happens after passion and lust has faded.

This feels more natural

Please cherish those people who accompany youthem no matter who they areat.

This means a slightly different thing to what you said, but it feels more natural.

The above isare my honest words but I know it usually doesn’t work for a person who wants to get into the world of immoral and taboofeelings, though I know if you have your heart set on leaving your partner you will still do this.

What you have written could be interpreted as rude, so I have changed the wording to seem less rude.
To have your heart set means that you have decided on something based on the feelings in your heart.

Please tell your partner the truth, that you are starting to fall in love with the another person, if you can’t stop thinking that you want to get intoenter a new relationship.

At least you should keepbe honest with your partner who hasmay been hurt.

I have said "may be" instead of "has been", since the partner will only be hurt if they decide to leave them.

I hope they can help you and that your partner is doing well.