Belief
I believe you / it.
I can imagine.
That’s true / for sure.
Isn’t that the truth!
I bet!
Ending the Conversation
We’ll have to get together / do this again sometime soon.
It was great to see you again.
I’m so glad we ran into each other.
I really enjoyed seeing you again.
Let’s keep in touch / get together again.
Take care / take it easy.
Catch you later / another time.