User blog comment:Thailog/Ep. 202 "Earthlings" discussion/@comment-432124-20120505230650

For those of you who think that Conner's aging problem couldn't have been the reason why he broke up with M'gann, I think you're being too short-sighted. For him, not growing up past 16 years means not being able to do a lot of things that he otherwise would have been able to do such as going to college, starting a good career, getting married legally, succeeding Clark as Superman, etc. He has to watch all of his friends grow up, change, mature, and ascend to new heights while he is stuck at his current position, with no chance of catching up with them. That would obviously have been a miserable life for him and he would have loved M'gann too much to drag her into that. That's how it usually is and I'm pretty sure that that's what he meant when he said, "She left me no choice".