In a caring relationship with an asexual partner, I'm experiencing a growing sense of apathy.

I’m [21], and she’s [20]. We’ve been together for about a month. I’m feeling really down about some recent developments. I’m in a relationship with a girl who was my best friend for years, and she recently shared that she identifies as asexual. Initially, I thought it wouldn’t be an issue since I truly love her. However, after discussing it again a few days ago, I’m feeling incredibly uncertain about whether I can really handle a non-sexual relationship. I genuinely want to make it work, but I’ve been feeling so apathetic about everything. It’s as if a part of me wants to shut down to avoid getting hurt, and I can’t shake the feeling that everything is on the verge of falling apart. What should I do? We’ve talked things through and are trying to figure it out, but this sense of apathy is consuming me. I don’t want to become distant or unaffectionate just because my mind is trying to cope. I'm not someone who thinks in the short term—I worry about the future. Can I see myself being okay with this in 5 years? 3 years? 1 year? It’s making me feel so miserable.