"Kellan is friends with [Miley's ex Liam Hemsworth] and doesn't want to insult him by getting serious with Miley. Miley came on way too strong for Kellan. All he wanted was to have a good time, and when they first hooked up she told him that was all she was after too. Kellan realised Miley was getting too close and has now backed off, leaving him feeling bad about them getting too close in the first place. He didn't expect her to get obsessed with him, because she acts so cool and independent. He feels bad. He never meant to hurt her."