The sentence "Don't go to the theatre ____________________" is an imperative (a command or suggestion) followed by a conditional clause.
Let's analyze the options:
Option
(1) "if you don't want to": This creates a grammatically correct and meaningful sentence: "Don't go to the theatre if you don't want to.
" This means: if you have no desire to go, then don't go.
The "to" at the end is an elliptical use of the infinitive ("to go" is implied).
Option
(2) "if you want too": "Too" is an adverb meaning "also" or "excessively".
If it means "if you also want [something else]", it doesn't fit well.
If it's a typo for "if you want to", then it's grammatically correct ("Don't go to the theatre if you want to [go]").
However, this expresses a contradictory idea (don't go if you want to go), which is not typical advice unless there's a specific ironic context not provided.
Option
(3) "if you did not wanted to": Incorrect grammar.
After "did not", the base form of the verb ("want") should be used: "if you did not want to".
Even if corrected, "if you did not want to [go]" is past tense, while the main clause "Don't go" is present imperative.
This tense mix is awkward.
Option
(4) "if you wanting him too": Incorrect grammar ("wanting" as main verb in if-clause without auxiliary "are").
Also, "him too" doesn't logically connect to the first part of the sentence.
Option (1) "if you don't want to" is the most grammatically sound and semantically appropriate completion for the sentence.