you sound so young and so conflicted. I can tell you, that as a parent, I must allow my adult children to make their own choices, not approving them, but accepting them.
It is a hard place to be as a parent, but if you love your children, if you admire the person he/she has become, then you must accept their lifestyle choice, even when it conflicts with your own beliefs.
It is very important to keep in mind, that at all times, you must be respectful of the values your parents hold onto. Do not expect them to reciprocate, at the beginning. They probably never will, because we, as parents, always assume we are “right”. At the same time, the love, affection and that we feel for our children should always outweigh our personal disappointments we may feel in a child’s choice of lifestyle.
You must make it very clear, that your choices are your own, made independently of the home you were brought up in, independent of the home dynamics and independent of the inter-family relationships you were brought up in and with.
Only then, can your parents be accepting, without blame and without guilt, which is very necessary for you and them to maintain a relationship.
I wish you much luck. It will take time. It will be painful, but you will get through it.