Well unfortunately when people have kids they do become their priority, everything else then does become of a lesser priority and they'll have a pecking order.
You can't change others behaviour, attitudes, values or what they consider to be important, if someone tried to do that to you how would you feel? I'm not condoning their behaviour, I fucking hate breeders and their spawn and if they were all fired off into the deepest reaches of space I would delighted........but I can understand what it's like to have things that are the utmost importance to me in my life and woe betide someone who tries to interfere.
I can't say that I have been ignored because I don't have kids, except when I dare to have an opinion on child raising (like they know any better, it's not as though they get a brain implant on 'how to be a parent' when they shit one out). But that's because I've steered clear of breeders and their litters and have spent my time with either like minded individuals or people who share my interests.
I didn't waste my time with people who no longer saw me as important, I couldn't change their behaviour but I could damn well change my own, what's that expression "doing the same thing and expecting a different outcome is a sign of madness".
Don't waste your time and emotional energy on people who aren't bothered, you can't change them, so make some other changes. Next time someone is clearly distracted let them know e.g. 'well, you're clearly too distracted to listen, so call me back when you're not....TaTa'! Stop putting up with the BS and stressing yourself out, their not stressed about messing you about, so stop doing it to yourself and putting yourself in the situation. 'No' is a very underused word, it's amazing what can happen when it's employed.
As I said on the other thread, friendships and relationships often have a lifespan and serve a great purpose during that time, but when circumstances change then sometimes relationships change. I'm sure you've been in a romantic relationship and at some point decided it wasn't working any more and you had a choice, walk away and be lonely for a bit, or put up with it and be constantly miserable.
Better sometimes to let them friendships pass naturally than constantly trying to resuscitate them and just angering and upsetting yourself in the process.
It's easy for me to say this I know that, but I have taken my own advice and lived through it and come out the other side and much happier and philosophical as a result.
Too bright to breed