LOS ANGELES (TheWrap.com) – Matt Dallas appeared to come out of the closet on Sunday night. The star of the former ABC Family series “Kyle XY” (2006-2009) said on his Twitteraccount that he was engaged to marry his boyfriend musician Blue Hamilton. In addition to a picture of Hamilton lounging on a couch with a dog, Dallas tweeted the following: “Starting off the year with a new fiancé, @bluehamilton. A great way to kick off 2013!” Dallas’ publicist did not immediately respond to TheWrap’s requests for comment. …