The difference between him and him

IM Convo with Him A

A: How are you?

Me: Stressed and anxious, I have a final today.

A: Oh, Good luck.

F2F Convo with Him B

B: Hey, how are you? Ready for your test?

Me: I think so.

B: You think? You know you got this. You just nervous. You need to relax and I know that's easier said than done.

Me: I know.

B: Relax, you got this, once you get the test it will all fall into place.

10 mins before my test, a text comes.

B: Relax. You got this. God didn't bring you this far leave you ;-)