Hi asensier, welcome!
First, about your age. I was older (35 to be exact) when I finally realized that what we learned when we were young wasn't the truth©. I've lost many years of my life. You're just 18 and you can still make something of your life.That's actually a good thing.
Secondly, about 'love'. It took me some more years to learn that what JW call 'love' is a very conditional kind of love. Those 'very close friends saying goodbye' aren't real friends. They might use some sweet words now in the hope that you come back, but don't forget that they condemn you by their actions.
You obviously want support of your parents.They are your real parents. My father was disfellowshipped and I always had contact with him. The elders knew about it and I still could serve as ministerial servant and pioneer for many years. So it depends a lot on the region where you're living and how strict their conscious is. I hope you can find a way to restore that contact.