Entering every relationship thinking "could this be the one" is bringing in way more then the two bags the airlines allow. Have fun, if it turns serious you need to open up about your issues, but no reason to spill all to someone you're casually dating.
Don't expect that your partner will automatically be ok with and come along for the ride, yes they should be interested in you as a person, but at the same time its your being either male (in this case) or female that is a major part of it too. Is a girl who entered a relationship with someone she assumed was a male, ready to continue that same relationship with a female? Probably not. So expect that the relationship will more then likely end, but if you have a chance to be happy, even if just for a moment, by all means take it.