The solution for this is simple; have kids if you want to. There are woman of the same feeling, so you can have a baby in 1 year or like including preps, pregna

The solution for this is simple; have kids if you want to. There are woman of the same feeling, so you can have a baby in 1 year or like including preps, pregnancy and birth. If you feel like it is too late, 40 yo is never too old for having kids. Alternatively, you can consider adopting a kid which will give you the exact same dad feelings. Nothing to regret yet, just do it!