There is a tonne of back story but to cut it short:
Fell pregnant young with DS & decided to keep him much to ex's horror
Gave ex the option of walking away (a hundred times) to which he declined. So he saw him about twice in the first year and a handful of times in the second year.
Once he turned 2 I said enough was enough and he could either start actually having him/spending alone time with him (instead of coming over and playing on his phone & watching me look after him) to which he agreed and he's had him for 1 night a fortnight most of this year.
But he is always whinging about how hard that one night is as he wakes up at half 5 (how does he think I bloody feel) & how much of a handful DS is in the day (well yes, he's a 3 year old boy, what do you expect)?
DS has a cold and as expected he's not sleeping great but he's pretty happy in himself so he went to his dad's last night and his dad has just posted on FB how tired he is & texted to ask if I can have him back earlier.
AIBU to think FOR THE SWEET LOVE OF GOD JUST STOP TELLING ME HOW HARD IT FUCKING IS. I FUCKING KNOW. I DO 90 FUCKING % OF IT AND ACTUALLY AM NOT THAT BLOODY BOTHERED BECAUSE HE'S MY SON AND IT'S WHAT YOU BLOODY DO WHEN YOU'RE A PARENT. 
I bite my tongue all-the-jeffing-time to make sure their relationship doesn't suffer but I am sick of it. Sick to the back of my teeth.
AND he's moving 175 miles away next week because his mum decided to move and he wants to be with his 'family' so DS isn't family then 
If he really CBA then why won't he just walk away. GAH.
I'm probabl being harsh but It's just been such a long, irritating thing