That was from the second Ghostbusters movie.
"I'm desperate for this money and we're friends, right?"
"Yeah, we're friends. But, you know, it's the type of friendship where if you're in trouble, I probably won't be there for you. Just like I wouldn't expect you to be there for me. It's a more honest friendship. It's not this like phony thing. It's a genuine friendship. I can't trust you. You can't trust me."