Schmeagle
A male, or description of behavior by a male, that is talking to, being nice to, paying attention to a female for the express purposes of gaining sexual affection from said female without being explicitly honest about his intentions.

Often performed in a creepy, obsessive or underhanded manner.

Also, often a Schmeagle raises suspicions from other males Samwise as to his nefarious intentions but manages to avoid any such suspicions from the female Baggins.
That guy is Scmeagling that girl, and its making me physically sick.

Bro, just tell her you want to nail her, don't be a Schmeagle about it.