They have reading weeks they can come home for.
Not necessarily. DD didn't.
The summer is 4/5 months long. So hang in there.
Except that many students going into their second and third years like to stay in their university city after they have moved out of halls because they have already started to pay rent on their accommodation, might have found work locally and/or prefer to spend time with their new friends.
@Slinky987 you need to think about how your son feels. If he is happy then you can be happy. Theur is nothing worse than getting a message at 11pm from your student DC asking if it is OK if they ring you, because it is always because they are feeling down. The phrase "you are only as happy as your unhappiest child" is so very true.
But please don't make him feel responsible for your happiness.
This ^^
Also, please don't guilt trip him into contacting you all the time. You want him to want to contact you, not feel like it is a duty.
I didn't feel sad about DD going to university. I was excited for her. She had taken a gap year (not gap yah) to work and volunteer and she was more than ready to fly the nest. I knew she knew how to look after herself - cook, clean, do washing etc. However, I remember feeling a little flat after she went, so I decorated a couple of rooms in the house to keep busy.
@Slinky987 you will get used to the new normal - honestly.