I can't bring myself to believe he is alive being held by a SO, partly because I do not think that is the case, and partly because I cannot wish that on anyone. If he is, there is no guarantee he would remain alive, or ever be located. Most likely he would eventually be killed. And not everyone can go on to live a "normal" life even if eventually rescued from such an ordeal. If a SO abducted Dylan, I doubt he was alive for long. A fourteen-year old boy over 100 pounds is not going to be easy to control and contain, it would be a daily struggle for the perp, IMO, and probably end in (more) violence.
Gosh, I wish I could find a way to believe MR has him, but I felt like since he did not "cave" before his performance on that show, if only to avoid doing it, or when DP seemed to almost have him, that he really is not in a position to bring him back safely. Either he is innocent, or Dylan is not alive.
JMO obviously