I really don’t want children. It’s not an I wouldn’t mind if I didn’t have them it’s a very very strong opinion of mine I’ve had for a long time. My last relationship ended as my long term partner assumed I’d change my mind on this and didn’t.
In a fairly new relationship with a very nice man, I’m in my late twenties he’s early 30s. At what stage would you check you’re on the same page? I don’t want to waste his time if he’s looking for a family.
I may be a bit over cautious after my last relationship and therefore want to be open and honest but I equally don’t want him to think I’m crazy mentioning it now. 
Help?