Thanks for using the forum.
It is important to remember that everyone's anatomy is different. Your eyes or nose probably look different in size, color, or shape from your friends. The same differences can be found in a woman's genitalia.
The part of your anatomy I think you are referring to is actually the vulva. This is the most visible part of you genitalia and includes the mons pubis, the outer and inner labia, the clitoral hood, the urethral opening and the vaginal opening. The appearance of the vulva can vary greatly from woman to woman. These differences can include size, color, and shape.
It is unlikely that your anatomy will feel any different to your boyfriend.
I hope that this answers your question.
Cathy
He is probably a virgin also so he won't know what a real life vagina looks like anyway. You will be okay .. feel confident about yourself!