Guy stopped talking to me, should I talk to him before he leaves?

No, don’t. let him go. He’s leaving anyway, so any connection you would create would be short and non-fruitful. Move on.

Do you WANT to talk to him?

Does it seem like he cares about saying farewell to you?

What could it hurt to just tell him goodbye and that you wish him well?
I would reach out to him. I think you would have more regrets by not saying goodbye than if you ignored him.

Take his lack of communication as a lack of interest.

No; he’s a memory now.

Give him the cold shoulder.

I’m with @chyna. A proper goodbye is like a bridge. And bridges should never be burned without very good reason. You might never need it but it is good to know it’s there.
Say a proper good bye, swap contact info, wish him well, then do not contact him again.

It’s awkward if I do though rite? Do I call him or ask to meet up a last time? What if he says he has no time?

If he cared, he wouldn’t have stopped talking to you. I wouldn’t even give him the time of day. Move on.

I’m with @LuckyGuy Text him to say goodby and wish him well. Don’t ask him to take time to see you. You never know what the future holds.

He can live without you, sad to say that. That was opinion.