Life In 19x19

Thanks in advance!

I am black! I won this, but i just felt could had been better!

: Doesn't end well, with White pushing through between your groups. Just J2 perhaps.
: Play this only if you have considered the cut and are confident the result will be good for you.
: Is this necessary for Black to live?
: Did you consider throwing in? Would that affect White's eye space?
: Really inefficient shape. You should not even consider this move.
: Unnecessary. Practically everywhere else is better.
Black 103: Also not worth taking gote for.
Black 131: Just give atari at P16.

(Turns out the numbered stones only go up to 99).