When I was in college my parents friends used to tell me, "These are the best years of your life!" And one time I broke down crying because I was so depressed at the time. If those were the best years, what was the rest of my life to be like?
Then I had kids and got older, and when I saw college kids I said, "These are the best years of your life. I miss being in college." And I saw that despite how I felt at the time, I was happy in college. At least when I looked back at it.
And now that my kids are grown and don't need me except for the occasional infusion of money to their bank accounts, I look back at raising them and realize that despite my 20 years of longing for OM, those were very happy times.
Our minds play tricks on us. Give it time and distance. It is not so bad.