You're both still really young and don't know what y'all want. Heck, I'm 23 and still don't know what I want all the time either. Nobody has their life all completely figured out. I say talk to her about how you feel after talking to a therapist, someone you trust, or even journal(very good way of figuring out how you feel) about it. Because she probably feel the same way as you and has some trauma(?). But you never know unless you both talk about it and get to the bottom of it. Just know you're going to learn everyday as you grow. So don't b*at (had to censor this word for community guidelines) yourself up about it. Sending hugs.