Nothing much anyone can say to make it bigger.
All men are different, some have small Flaccid like
yourself and have an average penis, some large flaccid
but does not get any bigger when erect.
Some even smaller than you but have an above average penis.
I can only recommend you get aroused a bit before
she sees you for the first time naked and it may not
look as bad as you make it out to be.
If a female chooses someone because of the size I think
you are better off finding someone else.