Hey, just wanted to add a few things. There were quite a few small mistakes, but the ones that I wanted to point out were these
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- Click Here To Show Diagram Code
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First time making a diagram, so you'll have to bear with me. The main point here is that your shape on the left wasn't safe. If white plays the marked stone and you extended down to A13, white can play D14, and capture those three stones. If you defend those stones he can reduce the area you would be getting and take the one stone. Either way it's a good situation for white.
When white played move 150 at Q12, you would have needed to respond with P12 immediately. Had he played P12 rather than R7 in response to R15 by you (Both moves didn't really do anything), he could have killed your entire N12 group.
The second picture that Dusk Eagle posted actually happened at move 113 in your game. Not exactly that, but pretty much the same thing
Also, K14 would have been a bad move for you at the end, white would just play L14, and you would have just given him an extra point. He actually should have played at L14 instead, it would have been one point more than connecting solidly at K14.
Anyways, this was all that really stuck with me. You'll have to take what I say with a grain of salt though, I'm only an 11 kyu, and it's almost 3:30 in the morning! Good luck in your future games