We put our children to bed by about 7pm most nights.
After that, in the evening, DH will spend a significant amount of time messing about on the Internet. Some of its work, some of its Facebook/Twitter, some of its useful stuff like updating car insurance. But I find he gets very zoned out by it and can easily spend three hours in an evening completely absorbed by computer and not even turning round to answer me.
So, I often read a book / potter round the house / watch a Tv program while he's doing this.
I've told him that I feel this isn't great for our relationship / isnt making time for each other, but I do accept that sometimes he needs to do family stuff and sometimes it's nice to have some time alone to do you own thing.
So, very long backstory to simply asking how much time you and your partner spend actually together during the evenings and how much time you're doing separate things.