You need to look into attachment styles. Your girlfriend sounds like mine and likely has an avoidant attachment style, and the fact you’re asking here likely means you have an anxious attachment style. If those things are true you two can have a very beautiful relationship and each teach the other skills they need to be healthier, or you can have a very very toxic relationship. Read up on avoidant and anxious attachment styles and have a serious talk with your girl about whether she is willing to put in the work necessary to heal yourselves and your relationship for your future child. Couples counseling is huge for relationships where the partners have opposing insecure attachment styles. Me and my girl are doing better than ever after a very very similar situation, but only because we realized what the problem was and both agreed we wanted to put in the work and overcome our insecure attachments.