Not necessarily, but reason to wonder what the secrecy is all for. Ask.
Covertly
Ordinarily infidelity is a part of a narcissistic personality. If you have been involved for more than two years and have caught him in lies it might not be narcissism it may be another underlying cause.
looking at someone secretly with out then knowing or a noob
told secretly
maybe. i need another, better answer
Whatever the Queens religion was, unless they secretly did another one.
he secretly goes out with the other guys girl
Fraud would be the charge in court.
the ability to effectively communicate information to another
It's no secret that the best thing about a secret, is secretly telling someone your secret, thereby secretly adding another secret to their secret collection of secrets, secretly..
He'll not be secretly sleeping with another person and will be concentrating on the two of you.
If you know a website with this, improve the answer with a URL of the website.