JT, you have a very valid point. Nobody is here to judge anybody or anything and nobody should do that, because this is a forum where males of all shapes, sizes and desires come together to build their romantic lives the way that they want them to be and seek out advice on how to accomplish what they want from people that have more experience. We've all been in one way or another where Max is now.
What's more is that should one choose to give advice is that it will certainly affect them at a deeper level, should the person that receives the advice chooses to take it. And that advice should be of the highest good possible for everybody involved.
One thing for him to consider is that if he still wants her ( he hasn't been around since he posted that bump ) at least wait until there is a conflict between them. It may or may not be any conflict, but it's still sound advice instead if interfering into things that are working fine just like that. If I were that guy, I wouldn't worry about this, but knowing that somebody that I know is actively interested and hitting on my girlfriend wouldn't exactly make me the happiest guy on Earth either. Flattered that my girlfriend is desirable, yes, always. Happy about all this, no, never.
It's great that you posted your balanced opinion on this, JT. Now he has multiple choices as to what to do now.