Secretly is an adverb.
The word for looking at someone or something secretly is "spying" or "peeking".
he is secretly in love with hinata and sakura knows naruto is in love with her
You can't help but feel love
yes always and forever!
It's a love-hate thing.
Covertly
tell them and see what happens
Adonis
If by secretly you meant cautiously then walking stealthily or tip toeing .
No secretly s an adverb, secret can be an adjective eg She has a secret friend
Yes, by the end of my fair lady he is openly in love with her.