My sophomore daughter will go back to school in three days, and I can assure you of this: It's so much easier the second time.
For now, just keep reminding yourself: Your son is doing exactly what you want him to do at this point in his life. He's pursuing an education and becoming independent. You don't really want to keep him a baby, and you certainly don't want him to become one of those grown men who lives in his parents' basement and is incapable of supporting himself! But I completely understand that you want him to go to school, you want him to earn a degree, you want him to move on in life . . . but at the same time, you also want him to continue sleeping in his bedroom at home and eating dinner with you every night! You know you can't have it both ways.
So, my suggestions:
- Show him a happy face. This is your cross to bear, not his. Tell him you love him, tell him you'll miss him, but he should put his energies into adjusting to college, not worrying about how y'all are coping at home.
- Put a little note in the mail right now so that it'll be in his mailbox the very first time he checks it.
- Once you've helped him move in, LEAVE. The moment of separation can be difficult, so don't drag it out. Decide what you're going to do that day: Probably help him move his stuff in, take him to the grocery store, and go out to lunch. Once those things are done, say goodbye and LEAVE. If you're going to cry, save it for the car ride home. Again, he doesn't need to deal with guilt because you're sad about dropping him off.
- Make plans for the first time he'll come home or you'll come to visit him. Most students go home for Labor Day, which is very early in the semester. When he does come home, clear your schedule and make all his favorite foods. Make it a celebration.
- Hold yourself back from calling him multiple times a day -- and you'll want to do so at first. Sure, you'll want to hear from him after his first day of classes, etc., but don't smother him.
- Recognize that your relationship must change. Change doesn't mean worse, just different. My daughter and I have changed our interaction, but we're still super-close. She's grown up a great deal. That doesn't mean I don't occasionally miss having a little girl, but I love our relationship now just as much.
- You will get through this. Really, you will.