I'm nervous because I told my girlfriend I wanted kids but I think I've changed my mind.
Are you worried about how she will react?
A little bit but I feel like she's been thinking the same thing.
Well, I'll say right now, it's really important that you talk to her about it. Kids are something both partners need to agree on so you should be honest and upfront about it. That being said, it's perfectly okay to change your mind and pretty normal for it to happen.
Okay I'll do that and see how she reacts.
I'm sure she'll be understanding that you've changed your mind, and will be happy because you'll have told her how you're feeling. Honest and understanding are two of the most important parts of a relationship, so it's good that you're trying to practice them.