Use an apostrophe.

synoniem: apostrophise.

Roget 589: Soliloquize; say to oneself, talk to oneself; say aside, think aloud, apostrophize.   

Roget 586: speak to, address, accost, make up to, apostrophize, appeal to, invoke; ball, salute; call to, halloo.    take aside, take by the button; talk to in private.    lecture etc. (make a speech) 582.    ... meer laten zien