You sound like a lot of infertile women I’ve known although you don’t say infertility is an issue. Do you feel this way even though you can have children, or is getting pregnant not a choice? Can you have children physically speaking, but are unable to financially or because you aren’t in a relationship?
I think the way you deal with this depends on the reason you don’t have children of your own. If you don’t have children by choice, and you find you are jealous, then perhaps it is time to have some of your own? If you don’t have a choice about being pregnant, then it is quite a different story.
For me, being infertile made me feel like an alien. But being male, I’m sure it was different. Intellectually knowing that when you have an orgasm inside a woman, a baby might result is quite different from feeling a baby grow inside you. For women, the experience of being pregnant has a reality that is certainly unimaginable to men.
So, while I felt like an alien, it did not necessarily hurt me to see others get pregnant and have children. However, for the infertile women I knew, what you describe was more common.
Not having a biological child is a huge loss, I think. There’s a reason we have evolved to want to have our own children, and that drive is very very strong. It’s kind of obvious—if we didn’t have that drive, we’d be extinct. No one would have kids. There would be no kids for others to adopt.
We want, I believe, to have bio-kids because they are our future and they are our immortality. For most of us, they are the only way any part of us will pass on to the future. For some, children of the mind (works of art) are their immortality. Others see teaching and guiding as a form of immortality. But only biological children can give you very much certainty that a part of yourself will move on into the futrure; into the forever.
If you can’t do that, then it is a huge loss. It is a death of yourself and you may love your adopted kids as much as you would love a bio-kid, you can never get that part of yourself be passed on no matter if that is the only thing you do (bear the child) through adopted children.
Seeing other people’s babies and pregnancies reminds us of this irretrievable loss. So that is why (whether you understand this consciously or not) you have such trouble with the envy.
I think that understanding it can help. This feeling is way beyond you. It is built into you genetically. It is what keeps the human race going. You can no more control it than you can control a tsunami.
So what can you do? Well, you do the same as you would do for a tsunami. You run away. You get out of the path of the tsunami. You do not expose yourself to the wave. And if you do, expect to be run over and drowned.
If you are sufficiently advanced, like a zen master or something, perhaps you can control your emotions. Maybe if you are a really good actress, you can pretend to be happy for others, but if I were you, I would limit my exposure to those with babies or to those who are pregnant as much as possible. You are just asking for trouble through that kind of exposure and unless you are very special, I doubt if there is a lot you can realistically do to control your own feelings.
And when people ask about when you are going to have a baby, I think it is highly rude. In any case, I think the truth is what they deserve, whatever that is. Maybe it’s rude to tell the truth, but it’s also not helpful to lie, because you don’t want them to keep on asking over and over. You have to separate yourself from the stuff that will hurt you. Giving people a good reason to not ask will help in that process. Hell, maybe you’ll even get some sympathy or support.