Any comments are appreciated. I know both of us made some large mistakes through the game.
A couple of specific questions if you have time:
1) B17-W18 exchange alright? Other better moves? I thought it was necessary in case white played P3.
2) B31. I was either going to play there or around where white played next. Thought it a kind of miai.
3) Better ways to deal with W38? I didn't know any joseki; kind of an unusual move. Followed as if it was a keima.
4) Could I have handled the K13 invasion better? Was it necessary?
5) Perhaps B93 at J7 or so instead of protecting one stone was a better option. I there anything I could have done better concerning the central lower left section?
Thank again in advance guys! I really appreciate it
fighting spirit, but maybe impatient.
R7, etc. As White settles,
- 
) standard bad habit & bad exchange for B. You think about why. 
W can start a ko with S8.
if you're not going to save the stone, then what's the point of 
?
strange.
floater: it doesn't do much. ( Just kind of floating there. )
almost unbearable. 
- 
) this exchange makes 
efficient. You helped W.
endgame move; too early. Gote. B would tenuki.
Too small, too slow right now. Look at the whole board.
another floater, like