i never wanted a boy, just lots of girly girls.... i was so so so lucky to get her first, then went on to have a boy and quite frankly after his birth sighed deeply when told it was a him. then after a while i was completely amazed at how nice boys actually are, he was so nice i went on to number 3 which again was a boy and they get on SO well that i sometimes feel that i cannot penetrate that brother bond, Its unreal. If it does turn out to be a boy prepare to be amazed, they interact so differently to each other, granted sometimes they are a law unto themsleves but it is still so worth it.
and just to reiterate what has been said previous, its absolutely normal to feel this way, yes its easy for me to say but i beleive if i had had three boys i would be as happy as a am now, i did'nt know that 8 years ago but i really do now.
children whatever the gender are what gets you through the day, with or without a partner they are YOUR life, your future. The child in your stomach right now, its hope is just so beyond our feelings towards its gender.
good luck xx