Acquisition phase

The early stages of a relationship whereby one or both parties show only their desirable qualities. They fail to disclose their flaws, true personalities, and true desires in order to be accepted, loved, and taken to the next stage of a relationship.

Once the acquisition phase was over, she wasn't nearly as likable.

schootch

To slide up next to someone in an affectionate manner.

I love to schootch up and watch a romantic movie.

Sangle

Someone who presents as single, but there is an angle. They may be married, in a committed relationship, or otherwise unavailable to pursue an alternate relationship, but they are checking to see who is out there that they have more interest in than their current partner.

He's definitely sangle, look at him work that room.