There's some comments in the sgf, I think my game-losing move may have been 114, but I'd like to hear any feedback.

Move 36 should have been the losing move, but he was good enough to give it back to you.

Q17 is HUGE. If he gets it first, he has the corner, he makes almost certain life for N16/N14, and he is threatening the slide to R15. If you get it first, you get to form a wall in sente while he scrambles for life. Then you can attack N16/N14.
Your play at Q10 leaves invasion points on either side, at Q12 and Q8/R8 - and others.

57 should be someplace in the upper right. Your position there is too thin.

86 should be at M3, I think. I haven't read it out, but it looks to be sente, threatening to kill his group with S2. If he struggles and lives, you will have built enough strength to rip into his moyo around H4 and K4.

94: Honte is B12.

116: You can still block, and it might be a close game.

128: F15 looks fun. Again, I'm too lazy to read it out, but it might kill.

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Thanks for the feedback. I looked a bit more at 128 and I think it does kill. I really wish I had spent more time thinking about that move now