You are in way better of a situation than lots of people, myself included, when this happened. Every child needs a dad, even if y'all don't stay together "forever", you are going to be a dad, 90% of being a good dad is showing up consistently. Another thing, don't be the woman's doormat, take charge, lead the family, she will respond positively to not having make every decision or be asked about everything. Sincerely, dude who got girl he was dating pregnant at 23, her 20. Still together 20 years later. Good luck, stay you, be your best you.