I thought that being in love was an objective reality for most people.
Did you? Are you even sure any two people would mean exactly the same thing by those words? The point is that it's an internal state of mind - only you can label your own state of mind 'in love'. Even if you have strict internal criteria, other people can't objectively measure it.
As I say, in the same way that most people believe, objectively, that they are in love
If god is more than an internal state of mind, then this is absurd. It is not an objective test.
Look, this isn't so hard; if I want to know about my own state of mind (am I in love, happy, sad, excited and so on) then I can find out by simple self-examination. That method is
totally inappropriate to deciding on the existence of things or beings external to me - you
must be able to see that, surely? If someone tells me of something that is objectively real (they have a pet wombat or something), I can't check it by navel-gazing.
I think the best way to look at this is to look at what they offer. Do they offer ill-health if you fail to worship them - as is the case in fatalistic Hinduism, or does god offer salvation at no price to you and I other than that we accept the offer?
So, the one you like most must be real?
That's easy - we treat it in the same way as we treat many aspects of our lives.
Many aspects of our lives are not objective. Doesn't mean they are not important or not real to us, but that's not the same thing as being objectively real for everybody.