I don't like my friend's girlfriend. She is annoying as fuck, can ruin conversations, and sometimes makes me really uncomfortable. I will speak up if she crosses a line, but I tolerate her because Macy is important to me. I have to make some sacrifices to be friends with her, and it happens to be hanging out with her girlfriend once every few months.

The thing is, you likely have things/people in your life whom you love and your friends cannot stand/dislike. Part of being a friend is seeing the upside to the downsides. If these people are important to you, then you can ride out the pregnancy and tolerate their kid a few times.

But you can also be honest and let them know babies make you uncomfortable, and you do not want to be on the babysitting list. You might not see them as much, but when the kid gets older and the parents are more willing to leave them with a sitter (six months in is when parents usually start venturing out into the world again) then you can have your friend back in some form.

But people change, be it career, children, or a job. So you just need to be honest about what makes you uncomfortable when the situation arises. But you might also need to suck it up sometimes and look at pictures, visit their kid for ten minutes, or at the very least send a chew toy for the little hairless puppy.

Now I am indifferent to babies and don't want to hold them or be forced to babysit. But I have a few (rare) friends who have kids. Or they have a nephew/niece who they hang out with a lot. The older kids (5+) I really enjoy (as long as they are polite). The babies usually are cool, I leave when they begin to scream. I would never do some of the stuff for people unless they truly mattered to me.

It is completely your choice to speak up now or later. But you might wait it out, be supportive, but also honest. The best way to deal with it is to phrase you sentences in a PC (parentally correct) way that suggests while you are uncomfortable with kids, you want to be in their (parents) lives.

So, if you have as few friends as you say you do, you might have to do some stuff that you dislike because it makes them happy. Doesn't mean you have to roll over, hold the baby, change diapers, or spend hours looking at pictures. It just means, maybe once in a blue moon, you sit down and ask about the kid, life, and act interested. I can gurauntee they do the same for you.