Im jealous this is making me sick (repost)

Okay, I feel dumb for doing this because because I am embarrassed for feeling the way I am. So there's that friend and I am really close with him. But recently he been kind of distant, barely answering to me and I feel like he is answering "just to answer" even if he is still friendly. He doesn't even start the convo anymore and doesn't ask to call neither, we used to call every nights.

I'm overthought about it, and I'm the introvert kind and kinda shy so I was scared he just got bored of me or something like that. But I just KNOW he found an another close friend, just my intuition.

And, we aren't dating or anything, but this is making me jealous, like REALLY jealous it makes me feel sick. I know this is weird but I have no idea why am I feeling that way. Expect that maybe it's because we were close, like REALLY close, so it's making me feel jealous but I don't know I'm kinda lost