My wife and I split for a year (it was all my fault), we're back together now some how. We have 2 daughters and I have a 15 yr old step son that ive raised since he was 4. I always said whatever happens with my SO, Id always continue to raise him. I guess the difference is its hard seeing someone you want to be with regularly doing the pick ups, but if you had kids of your own you'd struggle to walk away and break all contact. A couple of weeks apart with no contact may clear your head.