"to be a sore point (with smb)" как правильно перевести?

Why did you deside using italki.com? How has it helped you?

First notebook entry: Introducing myself Hello, everybody! I've been trying to learn (or study?) English since I was 20. Maybe my problem is in trying, maybe I should learn, not try :) I'm a bit lazy, but I'm doing my best. Last year I entered the language university. It helped me a lot, but I'm still ill at ease while I'm speaking with someone in English. I can't find right (or convenient) words to convey my thoughts and so on...