@appleseed,
I can hear your excitement:)
There is no difference than a girl losing her virginity to a long term partner, than to a one night stand...It's a matter of choice, your choice.
Bad things won't happen if people find out, they have no choice but to accept you for who you are and if they can't again that's their problem not your. You only live once in this life as who you are, live it but be careful...
Protection comes to mind, think about that.
It's obvious that you are not confused, rather that you need to find you and this has been bugging your for years.. It will give you the understanding of who you are one way or the other.
As for the future and a wife, but wanting sex on the side with a male? You don't know that yet however, ensure you do NOT marry a woman and do this without her knowledge 'up-front' or don't get married, that's un-fair to her, not only because you will cheat but you will cheat with a male... Imagine it the other way around.. You would feel you were an in-adequate lover and so she turned to a female.. Add in respect when you take your vowels.. No one likes a cheater.