Yaptığım onca hatadan sonra senin yüzüne bakacak halim kalmadı

what does this sentence mean? I would like to know, it is very urgent! 

xxx

My attempt:

 After all the mistakes I´ve made, I can´t look too your face anymore.

 It is correct, just an addition if you wanted to do a literal translation:

After all the mistakes I have done, I don´t have the courage to look at your face.

Thanks Merih !

Just a small thing but in English we ´make´ mistakes so a better translation would be Melike1´s 

´after all the mistakes I have made´

The second part is better though-we look ´at´ someone´s face rather than ´to´ it.

 Also, just to help learners, literally the sentence said "after the tens of mistakes I have made". "All the mistakes" is a great free translation.

It is interesting that in Turkish and English we use numbers differently. In English to imply a lot of we use 101. In Turkish you say 1001.  e.g. 101 things to do with paper.  1001 renk

We would never say tens of mistakes, we would more likely say hundreds of mistakes.

Also, I might have done a more free translation of the second bit as: I can´t look you in the face

No Marion,

"Onca" here means "that many". Not related to 10=on (number) but o=that.

Onca = that many

Şunca = that many (another variation)

Bunca = this many

 I stand corrected! I read it like a short form of onlarca.