According to Him ~K2/Style~

Since Stan and Kyle had been officially together, which has been for about 5 to 6 years after high school, Stan's alcohol problem hasn't lessened a bit. Kyle's extremely tired of dragging his boyfriend out of bars night after night, dealing with him at home with or without being drunk, and the constant need to be around him. He was scared to leave Stan, it was the fear of, 'what would happen to him if I wasn't here'? But, one day when Stan was passed out from the previous night, Kyle took a walk around town. That's how he met Kenny.
Kenny was sweet, loving, didn't drink. He'd fallen in love again. But. What about Stan? Well, Kyle decided that the fear wasn't going to stop him from loving who he wanted. Marsh was upset, but knew that there was nothing he could do. He begged and pleaded for him to stay. Kyle left behind a shattered and broken Stan, who took certain matters into his own hands.