My best friend told me that I made her feel uncomfortable.

Ok, so I totally like my best friend Amy a lot and she knows it. We were very very close and recently 2 months she got a girlfriend. I was jealous as I don't know what. I got jealous because I wasn't hanging out with Amy as much anymore. Then one day, I kept texting her and texting her and getting sad because she didn't return my calls. Then Amy called me back and we got into a fight because I guess she was with her girlfriend during those times (which I didn't know) and it was making their girlfriend upset. Nobody else knows that I like my best friend (Amy) though. My best friend told me that I made her feel uncomfortable when it seemed like I kept coming on to them. What does she mean by that?
My best friend told me that I made her feel uncomfortable.
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