Hi:
What you are going through is very normal, I'm a mother of 4 kids, 25, 23, 19 and 5. When my 23 years old left the house 4 years ago, I though I was going to die, not only because he left but because he was joining the Army, it took me a full year to get used to the idea that he was gone, then my now 25 got married when he was only 19, he kept living with us for 3 years, and had a kid during those 3 years, that when they left I was very relief, is wife is very strange, but I adore my son, so I will do anything for him, now they just got a second child, and it seems even though things are hard for them they get alone just fine. So you see is very normal, to feel depressed, down, lonely when they leave, they are very much part of you for many years, that the fact of they leaving to start their own life is hard for us a parents to take. Just give it some time, it will start getting better soon. I just moved to Houston a month ago, and I had to leave my 19 years old there because he is going to school there, he will move here to Houston by june next year, so that was another hard time for me, I'm driving him crazy because I call him very often, but when I don't, he is the one calling to check on me, from one mother to another, just try to relax a little, see them grow and start their own life, be there just close by just in case they need you, but we have to learn to let them fly, you will never stop worring, but the hole will be less big with the time. Take care.