Which way is the correct spelling for the word when using it in a sentence like "I will even keep it a secret from our parents if you want me 2"(I'm using the number now only to get across what I am looking for. It's definately not going like that in my manuscript."
This is a trailing preposition, and as such is spelled "to". "Too" is an adverb. Consider:
1) You want [me to keep it a secret].
The stuff in the brackets is an infinitive clause, subordinate to the main clause (the one with "want" as the main verb).
2) I will keep it a secret, [if you want].
Here the clause with "want" is a subordinate clause, beginning with the subordinating conjunction "if".
Now, let's mix the two sentences above together...
3) I will keep it a secret, {if you want [me to keep it a secret]}.
This is of course redundant, so strike all the words that are duplicated:
3') I will keep it a secret, {if you want [me to
keep it a secret]}.