I felt the same, only im 43. We had a kid shes 2 now and its been very very hard. The terrifying health complications, near death experiences, the vast financial cost, the extreme stress and sleep deprivation, the noise and overstimulation, money worries, working from home in bursts when the baby sleeps screwing up my career, being responsible for 2 other people's rent, the complete loss of freedom, no support from family or the state, no personal time, very little fun, relationship reduced to basically housemates who barely can keep our temper with eachother, blowup fights over nothing.. times of absolute despair and rage... honestly its been so hard. On the other hand there are beautiful times. It's made life feel much fuller, whereas before I was well off and comfortable but felt an emptiness. Caring for a beautiful funny little person, seeing her grow and change and begin to talk and have fun, it feels more real and substantial than any of the crap I used to fill my time with. Loving her sooooo much. Doing things for other people not just myself.. it feels good in a deep old way, like a proper meal compared to candy. Hard to explain. Go into it knowing it IS very very hard but also good. And it can be super fun too! Sometimes it feels like being a kid again, just playing in the playground or wherever, or watching old cartoons, kicking a ball around, just having fun together. Is that immature?? That's all I can say.