The Little One's Big Secret

I've been feeling pretty lost lately. I'm a nonbinary person in my mid-20s and I’ve always felt like an old soul, but now it feels like everything is shifting inside of me again. About two years ago, I discovered DDLG stuff through some friends, and I thought, 'Why not? It's just role-playing.' Turns out, there was a part of me that really connected with the little persona in all this. It felt like I found a missing piece of myself. I met my current partner about six months into exploring DDLG. He’s been great and supportive. We have these special times where he acts as my big brother and takes care of me, it’s pretty cute, if you ask me. But the last few weeks have felt different. I’ve been having these urges to act more like a child than usual, which is scary because I don’t know how my partner will react. Last night, we were hanging out watching old cartoons together when I suddenly got this overwhelming urge to wear diapers and cuddle with him. It was unexpected and intense. Normally, we stick to our usual DDLG stuff, but this felt different, it felt more like something a real little kid would do. I hesitated for a while before telling him my thoughts out loud. He looked at me with those eyes that always make me feel safe, and he nodded without saying anything. We talked about how I've been feeling more child-like lately but not sure if it's normal or just something fleeting. His response was calm but distant. He said he’s okay with experimenting once but wants to keep things in control. I’m worried now that this might be a phase I'm going through, or maybe even a sign of some deeper issue. Is it okay for adults to indulge in child-like fantasies if they're not acting on them? Or should I be concerned about these feelings and urges? Am I being too sensitive, or is there something more here that needs addressing?