I keep losing, but I think I'm playing stronger and stronger. I'd appreciate some feedback on this game. I think if I hadnt lost the lower left corner I would've won?

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Fixed it for you.

9: Too heavy, and the wrong direction to develop a 4-4 stone. Better would be O16 or O17. Maybe N17.

17: Unenterprising. The tobi to O8 flows better, or P7 wrecks his shape. ( He wants P7 for himself because it is a strong shape, right? )

Wife says dinnertime...gotta go. Maybe more later

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To continue,

B19: Don't you think that M3 is too far from his heavy + weak group that you've already cut off? When a move looks too ambitious, make your opponent justify it: cut him!

B29: Good. He ignored your move at P14 and you made him pay for it. The sequence through 45 is sufficient for a 10k game (though there are certainly optimizations you could make)

B47: Seems pretty passive, too early to be playing purely defensive moves. Locally, I'd be more interested in splitting O13 from N17 at this point--this is both an attacking move and a defensive move as you will establish a path to the center. If he manages to cut off your center access, you can then go back and defend the corner.

B51-55: good. C15 is not a great move, you reacted well to it. Personally I would be tempted to play C10 instead of D10: with your huge win on the right side, the more you can settle the board the harder it will be for W to mount a comeback.

B57: I'd be more interested in playing j3 first to poke at his m3 stones--a probe of sorts, asking what he intends to do with m3 while you prepare to approach D4.

B59: Not joseki that I know of. Typical responses to the close low pincer: taking the 3-3, jumping out, switching direction to C6 (which doesn't work with an extension already played), or occasionally attaching to the pincer. In the current board situation I'd take the 3-3 because a) it tends to settle the board quickly, which is to your advantage I think and b) you already have a good amount of center strength, so he won't have much opportunity to use his resulting outside influence.

B199: You should absolutely respond to G2. I believe this is your losing mistake.

B223: I don't think W222 is actually a threat--looks like you can get at least ko out of ignoring it. Sequence is left as an exercise! But even if it was a threat, I think the capture is larger because I believe you can use it to resurrect your dead If you capture at B7 and W takes at S19, I think there's a followup sequence in the bottom-left. Good practice for improving your reading.

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A few ideas. Still, basic shape problems.