OP I do not think you are being unreasonable and I like you but it bugs me that you're going to hell is an awkward vibe to be getting from a friend - I do however have a little experience in this area I can share. Let's call it a thought experiment you can share with your friend
We're going to be dividing the world into two categories I like the terms abstract and concrete, but what I might call abstract you (which is to say your friend) might prefer to call spiritual and material.
- you're sitting on a chair in a pub in front of you is a table and on the table you have some beer, in a glass.
The beer, the glass it's in, the table the glass is sitting on, the chair you're sitting on these are concrete, material things and there are certain questions that we can ask (and answer) about concrete / material things.
Things like what does it weigh? how dense is it? what is it's temperature? what is it's chemical composition / molecular structure? Material things are made of elements that appear on the periodic table.
But there are other things too, abstract concepts invented by people, but which may be profoundly impactful on the way someone lives their life. I'm talking about things like love justice honour beauty. People are capable of having profound relationships with abstract concepts. An artist, penniless spending their money on paint not food whilst they obsess over getting their picture just so could be said to have a profound relationship with beauty.
A lawyer might have a profound relationship with justice.
You can't weigh justice or write down the chemical formula of honour but these things are still incredibly real to people even though they aren't equally important to everyone.
You can't ask how much God weighs, it isn't the right sort of question. You can't use a thermometer to take a temperature reading of God, you can't write down the chemical formular or say what atoms he's made of because those aren't the right sorts of questions to ask about God.
People have worshipped hundreds of Gods that we know about and the range and variation in the Gods and Goddesses is much much wider than the range and variation in the people that worshipped them, which is enough to convince me that people invent Gods not vice versa. But just because God isn't real in the same way as the pint of beer or the beer glass or the table is real, doesn't mean he's not real at all. God's real in the same way as love, honour, justice, fairness and beauty are real.
Some people work for a pittance trying to get innocent people on death row acquitted, some people take holy orders and live a life of religious prayer and seclusion. Whilst these things might be abstract concepts that only live within the minds of humans it doesn't mean they aren't real or profound to people and capable of having a dramatic impact on how they live their life.
In short by all means talk to God but if he starts to talk back seek professional help.