But you can slow things down and spend more time getting to know the other person properly. The longer you spend with them before committing to parenting a child with them, the better. The longer you spend, the more chance you'll see how they react under stress, crises, when you (or he) is ill, etc.
I think people rush into commitments far too soon, i.e. buying a house together, getting married, having children, etc., often before they've had any experience of "tough" times for various reasons, so never see the other person under stress etc.
Anyone can be a perfect partner whilst on a few dates - it's easy to fake it, like it's easy to fake being thoughtful and romantic, etc., but only time will show the "true" person.
I remember the fiance of someone I worked with. We'd all gone on one lunchtime for "works" drinks and this girl's fiance tagged along. All sweetness and light, until one of our colleagues accidentally picked up his drink and took a slurp - he went ballistic and was pretty close to punching him - all for something accidental - he wasn't even drunk! It was very embarrassing, but once he'd calmed down, he was all apologetic etc. It was a massive red flag to me (and others), but the girl in question just shrugged it off "because he apologised". A few years later, a couple of years after they married, he beat her up really badly leaving her in hospital with numerous bruises and needed many stitches!
"Marry in haste, repent at leisure!"