Honey, you've earned that vacation!!!!!! Do not feel bad. I understand how you feel. I even feel guilty leaving the house for a few hours. But I know I need it and so I do it every day. It's really hard when I don't have a lot of time with my husband to begin with, then to leave and be by myself, I sometimes feel bad.
I haven't had a vacation in 3 years (for more than 2 days) And I'm going crazy! I can't imagine going for 6 years. Take your trip. Get a massage. Sit in the bath and eat chocolates. You have earned it! When mom's happy, everyone is happy!
Wish I could go with you.