Long story short, my DC was going to their fathers house 3 nights a week and with me 4. This was a longstanding arrangement which in the last year has changed with DC saying they only want one home and that they're happy to visit other house but not stay. Which is what has been happening. Child's father not happy with this, but has finally accepted its what happens as kids get older and I was happy with the change as long as DC was happy etc.
I would say my ex has been reluctant to pay any maintenance but in fact he has been positively hostile about it,staying that its not his choice to not have DC come and stay and as such he won't be paying me anything in support of DCs upbringing. I can manage and don't technically "need" the money, but I am worried about future costs of things like DC going to uni and that Dad is going to say he's not supporting financially etc. I know it sounds like a no brainer to go to the CSA but I'm worried about his response/reaction ie if hes going to be absolutely vile about it and whether I need the hassle or not.
YABU - go to the CSA and seek maintenance
YANBU - just leave it.