And not, thereis isn’t about a song by Justin Timberlake.

I'm not really sure what you were trying to say here but my immediate thought when I saw this was 'Can't Stop the Feeling' by Justin Timberlake so I wrote that sentence instead.

If you're sad, do you convince yourself that you shouldn’t feel this or youway or can you calmly accept your negative feelings.?

You need a verb for the first part so the 're is basically a shortened version of are (the verb)
Adding "way" is entirely optional.
Switching the order of you and can works better since you said "do you" at the beginning, which also lends itself towards a question.
Between you and accept, you would use an adverb if anything, so calm has to become calmly. However calmly doesn't really feel like the best fit here in my opinion. You could say something like willingly or wholeheartedly? I feel like there's a better word but I can't really think of one right now.

And I can be that too.

I don't really understand what you mean by this.

I have an image aboutof my feelings: It's autumn, and I sit by the stream ands leaves fall withfrom trees and float down.

Personally I prefer "image of my feelings".
I just changed the second part to make it more of a proper sentence instead of a list of ideas (I also changed "and" to "as" to limit the repetition of "and").
You would say that leaves fall from trees, not with them (the idea of leaves falling with trees implies that the trees are also falling).
Alternatively instead of "as leaves fall from trees and float down", you could say "as leaves float down from trees".

I see leaves, but I don’t try to influence of them.

In this case "influence" is being used as a verb, so you don't need another word like "of".
Where "influence" is being used as a noun, you might say "but I don't try to have influence over them" (for the sake of keeping the example the same as what you have in the sentence, but it doesn't really sound right in this particular scenario). Basically you would "have influence over something", but you could also "have control of something" which more or less means the same thing.

And not, tThere isn’t about song about Justin Timberlake.

If you're sad, do you convince yourself that you shouldn’t feel this way, or dor you can calm down and accept your negative feelings.?

And I can be that too.

I have an image about my feelings: autumn, I sit by the stream and leaves fall wifrom the trees and float down.

I see leaves, but I don’t try to influence of them.