get on with (someone)
To have a pleasant relationship with someone; to be friends with someone. I've always gotten on with Amanda—I think she's very nice.
get on with (something)
To proceed with some action, intention, or pursuit, especially after a delay, distraction, or pause of some kind. Go and get on with your homework—you've played enough video games for one afternoon. I've been waiting for the concert to start for 30 minutes—I wish they'd get on with it.