Hi guest. Technically you can only lose your virginity when a penis enters your vagina but through inserting a finger or any object can break your hymen and for some cultural beliefs for a woman not to bleed on the first time of having sex after she is married means she is not a virgin, there are many other ways though that a hymen can rupture though by simple every day things without the person even knowing from such things as riding a bicycle, stretching exercises like used for gymnastics to using tampons and also horse riding. It really depends on your cultural beliefs and how you feel about it even if others tell you it doesn't matter. You may also find that your gspot is hard to find and doesn't really give you that much pleasure, your clitoris is the most sensitive part as it may only be small on the outside but can give the most amount of pleasure he stimulated right.
Hope this helps and he you have any more questions feel free to ask :-)