My doubt of solipsism is fading and so is my empathy.
Oh, come on.
Look. Even if you're God, no man is an island. You've constructed a reality for yourself where the combined efforts of many are superior to the individual efforts of one.
So merely out of practical, selfish benefit, it's in your interest to treat the rest of us illusions like we're real people. You're under no obligation to stop being a solipcist - many, many people adopt this very view (or appear to or whatever) - but, just like atheists confronted with the absolute lack of universal moral law enforcement, it still behooves you to interact with your made-up society in a moral way.
It's like playing Solitaire. Obviously they're your cards, and since it's a solo game, there's nobody to stop you from putting cards wherever you want. But once you start the game, what would be the point of cheating?
Honestly I doubt that the habits of a lifetime of empathy for your fellow human being are going to evaporate completely because you discovered a little sophmore philosophy. Go down to a coffeehouse and use this bullshit to seduce freshmen. Solipcism isn't worth a good goddamn for anything else.
™ Version 4.2
