Always feel happy and sad at the same time when I drop my little boy back at his mum's.
Although I know he's had a great time I always feel I didn't do enough.
Remember how important hugs, cuddles and LISTENING are...children know they're loved, even if we don't do elaborate gifts, amusement parks, etc. Remember to tell him every single time how much you love him....how much you LIKE him and how much you look forward to seeing him soon. Believe me...I know how you feel.