Okay here it goes.

A while back my long term girlfriend and I were talking and got into a heated debate I would say, over whether penis size matters knowing her history and that she's been with a man basically double my size in girth and a few inches longer than me and knowing this man never struggled to get her to climax whether she had been drinking or whatever I argued that size matters in fact she likes a bigger than average penis. So after some talking and back and forth she admitted that she does wish my penis was bigger and at that stage he was(or still is maybe she said it to stroke my ego) was her best sex she ever had. I do love her and she loves me(already talking about the wedding)  and I know it shouldn't matter but honestly I feel useless in the bedroom less of a man many times she says she's happy with me and my penis but how do you move on from a hit like that to basically what makes us a man our genitals(and ladies that's where our ego lies you can deny it as a man but you are lying to us and yourself). I've been struggling for months now with it and it always gets me down. Any advice on how to move forward would be really appreciated.