You can stay close to someone you disagree with. It’s the mocking that makes it impossible.

Disagreement survives almost anything except contempt. You can hold completely different views about politics or religion or what matters and still sit at the same table, because an argument assumes the other person is reasoning and might be right. Mockery removes that assumption. Once somebody is a joke to you, there is nothing left to discuss, and they can feel it even when nothing is said directly.

Keep the disagreement and drop the eye-rolling. Argue with the strongest version of what they think rather than the stupidest. And if you catch yourself doing an impression of somebody’s opinion, that is the point at which you are losing the person.