Hi Pio2001,
At E15 ? If you want to jump, the kosumi feels slow.
C17 ?
Like Kirby said, B18 seems very natural -- did you misread ?
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This seems to make a difference: if at B18, your group is settled, while W's is not.Now, W is almost settled, and yours is not.
Beware: When weakness becomes strength ; when strength becomes weakness.
B13 takes away your base.
Again, C2 is the local shared vital point.
Take the ko !
Not urgent. A18 first, then B13 to take care of your group.
B13 to attack.
Bad habit, wrong feeling. ( Bumping your head against W. )
P3 to force W to live in the corner in gote, while you profit the outside.
You got tricked. Peep at M2, and if W connects, then attack the entire W string (say, starting with M6 ).
You got tricked again, wrong shape. K2 is the shared vital point.
Kind of a disaster result for B.Compare this result vs.
at P3 ; and vs. peep & attack W.
Your note about this move -- no, the mistakes are earlier; it's already too late. See above. 
...especially if you get gote for zero gain.
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This exchange helps W, does almost nothing for B.
Get rid of this bad habit to give free points to W.Instead of
, if you directly hane and push with 
and 
, do you see W cannot have the very nice eye shape at like in the game ?
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Same bad habit as . You help W, for very little gain for yourself.
Very strange ; Locally, why not F5 ? Globally, too small ; tenuki.
L11.
101 Nothing to build there -- neutral area. Look at the whole board , see the global picture. 121 If you've come this far, you might as well finish it off with P12 -- good aji.( Throw-in at S13 first, if you want to leave an extra ko threat at S10 just in case.
)(
159 - 
160 ) Same bad habit as ( , & ) -- Finally returns to bite you. Q16 directly. 171 -- Go back and study , , , 159 -- notice how you like to bump yourself against W, shortage of liberties. 189 J6. 199 Shortage of liberties. 211 G1 atari.