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Move 27: Your move is a shape point, so it can't be that bad, but it is a bit premature. Ed's suggested alternative of of O4 is an improvement. But you might also consider K16.
Move 29: Not a bad move certainly, but maybe a bit tepid.
Move 47: You have two stones at C10/D10 which are becoming overshadowed by his 4-stone wall. You might consider B10 or E6 or B4 or F9.
53: What do these stones do for you? They control no territory, they don't cut anything. Losing them costs you a mere 4 points. At this stage of the game, there are bigger moves like C3.
65:Ed's suggested F4 is certainly the better shape move, but it may be premature. There are tactical possibilities with C2, which threatens B9. ( If he answers B9 with C9, you kill with B7; if he answers B9 with B8, you play A8. )
I could be wrong here, for I have not bothered to read every variation, but the corner looks like it is worth fighting for.
67: Even though slightly misplaced, G4 makes C2 even more interesting.
85: A strong move!
87: Don't let him escape. Double hane.
105: T11.
107: You have huge hanes at M3 and S3 and N7, and a kill at T11. But you are playing safety moves.
111: Too close to your own strength. Try N11.
Overall, you're being too nice. You gotta learn to kick people when they're down.
Your opponent had several weak groups but you let them strengthen themselves.
at F17?
All ideas welcome!
at 9. To be corrected