Move 6: I feel settling like this is too passive for white, the left is an area white wants to build. After move 26, white has made two small groups the left is easily invaded, white hasn't gained very much at all.
After move 22: The result of this joseki is good for white, Black's bottom has poor potential, and white is now all over the right, the loose pincer was a bad joseki choice, because black really wanted to block the other way.
Note now white can attack black's group with O2 and O5 a little later.
Move 28: this move should be golden, guo juan 5p herself guarantees you can only get good outcomes from playing this move

I don't know if you subscribe to guo juan's internet go school, but if you don't get a good outcome if you send her your sgf she'll tell you where you went wrong
Move 34: Although when black plays at C2 White's group isn't alive yet, playing at C9 is too slow, your group isn't weak when your opponent is. Black's play at C2 hasn't made black's group alive, so white should keep attacking this group F7 looks OK, as now black will be sealed in, and white can build the outside
Move 38 and 40: These moves aren't needed here, if you can cut, cut, if you can't then don't just play there. these kinds of moves are bad sente moves, black becomes strong and removes any chance of shenanigans later, the result of these plays gives white bad shape. White has made these stones a lot heavier, their loss will be much bigger, this group has no eyes, and is making no territory, Move 38, playing at F9, connects these stones to the group at the edge.
Move 64: Don't feel the need to always connect against a peep, sometimes the cut doesn't even work...
Move 70:
Playing this move isn't great, white can't develop in this direction, lets imagine Black has already played at S9, would white play at R9? We know when white plays R9 black will play S9, only the fact that white has sente allows this group to escape?
Examine the stone at Q11, the relationship with this stone and R9 is bad, black can cut this knights move relation easily. It is hard to see any good result from trying to save these stones, I think when Black peeped at S7 at move 63, white should just play calmly at S6. If black pushes through at R7, white can just cut at Q6, if Black blocks at P6, white cuts at Q7, now black can give up those two stones, or let white into the middle, white gets a good result either way.
Move 76: Your white group at R9 is still not alive, this push is a bad idea as it is damaging the R9 group, if black plays P9 are white's stones captured? This result gives black about 2 more points than white before komi, so its probably a good choice for Black to take the profit, then see if he can get a few more points to win. Of course the two white stones are weak, but white has two weak groups, trying to save them both won't end well. The two stones are light right now, so white should save the bigger group. Or not tried to save it at all, and make something from the sacrifice.
I think Black's mistake was at Move 116, Black should take white's one stone at R12 and connected out, though the throw in at move 125 was also a mistake S12 also looks to connect Black.