Would I be an asshole if I asked my brother NOT to call me for advices anymore?

My brother is driving me crazy and I'm frankly quite frustrated with his behaviour considering my niece is stuck in the middle. The mother of his child and he are not together but "trying to find back together" - this has been going on/off for over a year. Every time something goes wrong, my brother calls crying - ready to pack his shit and move out of the country, doesn't show up to work and just gives shit about anything but his misery and loneliness. This happens pretty much monthly. No matter what I advice him to do - he always does the same thing, apologizes and then everything is good, for a little period.

I'm a fixer so this is hard for me but you can't fix the unfixable and I feel that this is something unfixable for me.

Would I be an asshole if I asked my brother NOT to call me for advices anymore?
Post Opinion