i have always been insecure with my dick size (6inch), in my country average its like (4-5), but i think its not enough, i have a girlfriend, we courrently have been dating for 5 months, and i cant make her cum (she have never cum, even masturbating she cant), i fingered, fucked a lot of time, oral sex and nothing..., she says maybe its her fault, but idk.

so yeah, she says its big for her and shit, when i fucked one girl once (one of the 3 bodycounts) she said its was huge and said it every time she saw it lol (she didnt came 2), its just my insecurity its so bad that i dont belive them.

what should i do, i want to make my gf cum but at the same time im very insecure about my dick. (sorry for the bad english i dont speake it)