Ending a conversation abruptly
I’m going to have to run.
Must run. (informal slang)
I’m all out of time. I’ll have to say good-bye now.
Look at the time. I really must go.
It’s been great talking to you, but I have to go.
Wow! I’m late. Look, I’ll call you.
Sorry, but I have to leave now.
Let’s continue this another time. I really must go.
Sorry, gotta go! (very informal)