Boyfriend just found out he has a baby

I’ve been with my boyfriend 11 months and he just found out he has a 5month old daughter he goes in next month for the dna test. I don’t know how to feel or what to do We’re not in a position for a kid. Anyone have any similar story’s how do you be a step parent. I want to support him but it’s hard cause I can’t have kids of my own and this isn’t what I signed up for. We go meet the baby Saturday.. idk what the point of this post is sorry

Update:::

I do not resent this child If it’s his I would obviously love it as mine but it’s a difficult situation. She never messaged him to meet today so he decided he’s just going to wait till he gets the results from the test and go from there