Seni kimsenin incitmesine izin vermeyeceğim derken bu işi kendim yapacağım demek istediği, hiç aklıma gelmemişti.

I´m lost.

For me it means

"i wont give the right to anybody (i wont allow anybody) to hurt you i would do it by myself that what it means, it didnt come in my mind (i´ve never thought about that).

but if someone can confirme it 

Hm yeah, I tried it like that Emine but the sentence doesn´t make any sense to me like that...

Yeah you´re right for me too...

I think it means that if someone hurts you it´s like he/she hurts you so he/she wont allow anybody hurting you.... Because he/she never thought about hurting you.... That´s how I understand this sentence 

can anybody help with this ?