Why did my friend tell me to stop speaking to a guy she was speaking to?

[AM2939E]

So I went out with both my friend the other night to have drinks. One of my friends went to the bathroom and then my other friend told me that she was speaking to this guy she met through online dating and was seeing him. She told me that he mentioned me and that he also matched with me on online dating and was interested in me, and she showed me a picture of the guy and asked me if I’d been speaking to him. I said I’d never spoken to him before ever and that I’d deleted all my online dating apps. I told her it would probably have been another girl in the same area with my name. Then she proceeded to tell me that I shouldn’t speak to him as he was already obsessed with a girl called Gemma, and that I would be wasting my time speaking with him.

she then sent me a photo of him as a private message and I had to keep convincing her that I’d never spoken to him

why did she bring this up and tell me to stop speaking to a guy she was seeing who I had nothing to do with?

[ZS007]

your friend doesn't trust you for some reason. She also coming of as jealous and possessive even thought it sounds like she just started talking to him. Degrading you isn't nice either.

[aj0601]

She’s definitely jealous. Especially if you’re more attractive than her it’s gonna happen, Friends or not.

[daddysbabygirl1]

She apparently really thought you were speaking to him! She was warning you to stay away. I wouldn’t call that a friend

[Wise4myage]

She has the hots for him, and thinks you do too.