I've got positive stories!! Millions of them, honestly I could sit here all day. But ultimately, you will wonder what the hell you were worried about.
I have two sons aged 2 and 4 and a daughter who is three months.
There are 20 months between my boys and yes, the first year was a blur. My DS2 was an incredibly hard baby - didn't sleep, colic, reflux, hated the sling, the car seat, the pram - it was tough. But he's not the norm, my friends babies and my other kids haven't been like that, so it is unusual. And we survived it, I just took it day by day. I didn't breastfeed, which will probably get me thrown on mumsnet, but it was just one less thing to worry about.
Despite that, he just was and is the joy of our family. He's nearly three now and him and his brother are the best of friends, they are a real team and on days when my oldest son is at nursery they just miss each other the whole day. Their relationship is us one of the things in my life that makes me the happiest.
I also worried about my relationship with DS1, but we have such a strong bond. We are very similar in nature and are incredibly close, this hasn't changed.
Throw my new baby into the mix and again, I worried about the impact, but she has been the best thing to ever happen to those boys - they adore her.
Honestly, you think you can't love another child like you do your first, or bond with them the same and that you love will somehow be diluted by another child. But it's nonsense. Your heart just gets bigger and the love just gets stronger, not weaker.
I'm not all rose tinted glasses about it - I haven't spoken to my own brother in years so I know that siblings are not always a good thing. But as children we were close and I wouldn't have been without him.
Wait, just wait until you see your sons playing together. Or you hear them having a conversation when they think you're not listening. Or helping each other with something without you even asking them to do it. It's amazing.