If you are not married, now is the time to address this issue. If you get married and this issue pops up and leads to divorce then she's gonna take you to the cleaners. Try gettin laid when you're broke. You have a legit gripe, go speak your peace.
whoa whoa whoa... 5inches girth? is that circumfrence or diameter? because i thought we went by diameter on that one... how does that fit into ANYONE? you're lucky to have a girl who can TAKE that, so be happy with one.