I'm 28 year lady I have one boy now my husband want separation from me and I don't want that .why he listen his parents all the time not me? He think I'm lying to him

If you are not lying to him, and he rather do as his parents say, tell the little boy to keep listening, to his parents while you live an adult life. Until he grows up enough to take responsibility for what he has created, his own family, then you are married to a child, when you need a man.

Let his wallow in his own shat, and handle your business without him. He may grow up, and that's great, he may not, and that's not your problem.