Is it normal that i become jealous whenever my online friend calls her other friend?

Why do I feel jealous whenever my online friend calls her friend from real life? Let’s call my friend from online Claire and her friend Amy. I know I can’t just not let her have friends in real life, but I’ve been friends with her since fourth grade, and she’s been the longest friend to ever stick with me and it’s just been bothering me. These days if she calls me, it’s always “Incoming video call from (let’s say) Amy and Claire”. I know I shouldn’t feel that way, but I’ve been friends with her for so long now. I also don’t add my friends when ever I call her. It feels like Amy is a replacement of me, even though it’s not. We used to also always play video games with each other (in that one it’s basically a level up thing) and now we did it again for memories and because Amy suggested it. I feel like a third wheel a lot and it just makes me feel uncomfortable and because of that I sometimes just don’t answer the phone because sometimes it’s like, “Oh, (name) I didn’t even notice you were here!” or something like that. It’s not a big deal, and it’s a small thing but it hurts. I’ve always been on the sensitive side and so i get my feelings hurt easily, but I’ve never told Claire because that’s a stupid idea in my opinion. Maybe it’s because of that?

So basically, I know it’s dumb that I feel jealous. I don’t want to tell her that it bothers me because it’s just going to make it more awkward. And is feeling jealous like that being toxic? Is it even normal, and has it happened to anybody else or is it just me?