Just reread your comment. Don't kill yourself!!! Help raise your niece or nephew or friends kids. You can pass on social inheritence! And you can work in a cube at Google and send half the money to kids charities.
Only if you have a time machine
Ain't no more cubes at big tech companies, it's all open office
sperm quantity and quality decreases with age. studies exist that suggest higher risk of autism when father's age >= 45.
you're not too old, but you should probably test & freeze some good sperm before you might actually be too old by the time you find the right person. this way you won't ever feel like you're too old to have kids. then the question becomes more of "how long and in what manner will my remaining health allow me to enjoy them"