That is exactly what concerns me too. If he doesn't take good care of himself in his twenties, what will happen in his thirties/forties/fifties? Is it going to be all downhill from now? I mean, as we get older, health and looks deteriorate.. Especially if you don't take good care of yourself. He does contribute to household chores, but I do notice that there's many things that I take care of just because 'I know how to do it' or 'I do it better' or frankly I just think it should be done.

We're both in gradschool and I think that things may change once it's over. So I guess I will do as you say - try to be a positive influence, see how things play out once we're both finished and, sooner or later, I will have to decide if I want this forever.

Thanks for your reply, it's good to see your perspective on this.