Hey everyone. My friend has been overeating and not exercising at all for years now. I really want to tell him to start exercising before his health conditions get worse, but he's very sensitive about the whole topic. Everytime someone raises the issue (privately, not in front of others), he acts like the victim and says he will do what he wants. 

The thing is, he subscribes to various health subreddits, and likes reading up on different diets/workouts. So i think deep down wants to get fitter, but just doesnt have the motivation.

Yet, when someone raises it up, he throws a tantrum and claims everyone is against him. 

So will i be the asshole if i raise it up with him? And how should i go about doing it since he's so sensitive about it?