Doesn't sound selfish to me. Sounds like you are noticing that you need to work on you. They need time with their other parent, and you need to be in good shape for you.
Be at peace with that.
AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."
