Hello SqueakyPea,
Yes it sucks, yes life will change, it's okay to be frightened. I found the hardest part telling my family - once I had done that it seemed like a huge weight was lifted.
You may lose some friends who will not understand or know how to relate to you. That empty place will be filled with new amazing supportive friends. You may come to know some of your friends so much better than you ever did.
Thinking about how things will change and how life will be will not help you. It just takes up time. Live for the moment and enjoy the now that you have - look at the clouds and the stars. Laugh and cry with your friends and loved ones.
Dont be so hard on yourself. There are some amazing strong people I have met on this site. There is always someone who will listen, share and most of all understand how you are feeling.
All the very best.
Maria333