how i know wath level of english i have?

How do I know what level of English I am at?

My name is Omar. For a long time, I have been wondering at what level of English comprehension I am at. When I listen to another (person) speak (English), I have an idea of what they are saying, but I am having difficulty speaking.

Notes: Using him/her or his/her is not wrong, but many people are using "they" instead. Even though "they" is typically plural, it can be used as a second person pronoun in the right context. I can generally understand what you mean when you are writing, but some phrases can be shortened. "Since many time" doesn't make grammatical sense, but you can use "For a long time."
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so, i andertand there are diference between speaking and listening, then i think my english is very basic, but i insist, when someone speaks I understand the majority he says.

I understand that there are differences between speaking and listening, but with that being said I do think that my English is very basic. However, I can understand a majority of what another English speaker is saying.

Notes: Again, I have a general idea of what you're writing. Make sure you capitalize your proper nouns and make your adjectives, verbs, and nouns agree with each other.

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every day i am most convenced that it is necesary the fluency in the conversation, i think this actives the others, listening, reading, witing. with this i think i can to know how is my level grow up

I am convinced that listening, reading, and writing are things one should practice to become fluent. With this practice, I know I will become better.

Notes: I'm not sure if my corrected phrase is exactly what you meant, but I did have some difficulty trying to decipher what you are saying.

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what do you think about it?

I am very impressed. You still need a lot of work, but I understand that English (as many languages are) is difficult. It seems like you understand the general concepts of English, but you could use work on refining certain skills. Keep going, I know you will do very well!