If a God is truly a God then they shouldn't have a say in who gets to be happy at all. After all, they're only there to watch over us, correct? I don't see why prioritizing your own happiness would be seen as a fallacy towards whatever God you believe in.

[ But here's Ozpin saying that and yet he's had his time as a pretend God for the people. But he's also met Gods too. ]

But, well, that's also for you to decided. Many people sacrifice everything they have to ensure the safety of others. It all depends on what you wish to do. I have no doubts that whatever choice you do wind up choosing that you'll see the one best for you and the one you love.