Hmm, I'm afraid we'll be gone long before; even in less than 1 billion years from now.

But let's imagine we could see M31 much closer....
There would be more stars to see but they might not be so close: our galaxy might stretch itself to such an extend that arms might split or scatter very far, so far that the familiar lights of their stars will be far dimmer than today.
Andromeda itself has stars that will also spread in a huge amount of space and the distance between stars (in our neighborhood) might increase, making the sky darker than it is.
Our pictures of M31 are always with long time exposure, gathering far more light than our eyes can catch. We can't see M31 the way the picture shows, not only from our actual distance, but also from much closer.
And, besides, the Sun will be so hot our planet will have become a modern day Venus, completely covered with clouds, and we would be incapable to see anything through it. We'd have to be somewhere else!
But we'd also be something else too, by then.

Raoul