Ever since coming to Thundersplace several years ago I actually have felt more confident in my size. I’m smaller than you at about 6.75”BP (6.25NBP) by 5.5 and I would consider myself large, not huge but large. I mean I can wear magnums no problem, granted they are only slightly larger. I have added a quarter inch to each direction and do desire to add a little more. 7NBP x 5.75 or so would be my ideal I think, but I’m not stressing about it.
It’s definitely a mental issue. With the plethora of information on this forum about what the true average is and experiences from countless men who have had trouble having sex even at sizes smaller then yourself, maybe you shouldn’t be so hard on yourself. You seem to have the “Wangorexia” that was talked about in a previous thread.
With that said you are not alone in how you feel, I just don’t happen to share this misconception.