it's so odd, I just read an article on this sort of topic today. I was about to post a thread and here it was already. I have a different angle though. Not exactly a post-partum depressionin males approach.
You see, I read an article about a man who wrote a book about the first days right after his wife gave birth to their babies, and how he coped with it. In it, he exposes how it's not so easy to bond with your child and how many men feel quite lost, because society expects them to feel a certain way, that is probably not natural at all.
It also mentions how there are a ton of books on how women can cope and learn to care for their babies, but almost no literature of this sort aimed at men. As a consequence, most men have to learn from the moment the baby is born, improvising as they go along, and learning to love the child.
It also spoke about why men may not feel so naturally inclined to love their child straight away, and offered some theories - a man isn't as sure as a woman that the baby is their own, instinctively speaking. For a woman, there is no doubt.
The writer went on to say, whereas in the beginning he felt that if his baby had been rolled under a car and killed he would have felt only a passing and required feeling of sadness, 6 months later he would have thrown himself in front of the car to save her from harm. Shocking but fascinating account.
Anyway, here is a link to the book.
I think this is an important issue and should not be overlooked.
It's ok to feel that way dlish. Just make sure you can talk to someone about it and let it off your chest. Your life will inevitably change, but it's in your power to maintain your individual interests going too. Love your kids, but don't live for them. When they're all grown, you want to have something of yours to look forward to. That's my take anyway.