Zaf - I suspect its a lot of nervous energy about going on holiday - probably your mind working overtime! Don't forget to rest when you can - you don't need me to tell you all that, but think of it as encouragement :)
Depina - Its not feeling sorry for yourself at all. Its something that evidently brings your mood down, so it is important to recognise and talk about it. As Zaf said, have you spoken to him at all about it? Chances are, he doesn't even realise.... I live about 150 miles away from my parents and I love them to bits and miss them terribly, but before all of this and when I was working, I'd phone them every 2 weeks or so... not because I didn't want to speak to them, just because by the time I had been to work, maybe done some shopping, come home, cooked dinner, walked the dog, had a bath, got myself ready for the following day... I was exhausted! I expect its one of those things thats always on the list 'to do' but unfortunately, tends to get pushed back because you are 'mum' and you'll always be there :)
I'm feeling ok today - been out and declared war on all the weeds!! Dug up my potatoes.... 3 potato bags full, god knows how many litres of compost and I end up with about SIX POTATOES! />. Rock on....