Is OTHER wrong in the post ? POST : TL;DR at the bottom

So, a little backstory. Me and my friend has been really close since a couple years back, we share everything. 
A while back she started talking to this guy and at first I thought there was something between them so of course I asked like a million times. 

Every time the same answer. 

We’re just friends, I don’t like him, etc. After a while I just gave up because it seemed pretty clear that they were in fact just friends. 

Now I’ve been single for way to long in my opinion and I easily get bored of people, therefore I start talking to new people all the time and I stumbled upon this guy. I got his number and we talked for a couple hours that night. 

Like I earlier mentioned me and my bestie keep no secrets so I told her that I was talking to this guy. Since I had joked about the two of them before I left the following message “haha think I might have stolen you boyfriend just now”. She doesn’t have a boyfriend so at first she was like what? Who are you talking about?

I explain to her that I got this guys number and had talked to him quite a lot the night before and she FREAKED OUT. 

I’m just gonna say it again, she had said multiple times that there’s nothing between them and never will be and I trusted her. 

So now she was all mad at me and I could not for the life of me figure out why. Of course I asked again if she was into him and again she said no. 

My bestie is a little on the jealous side and I understand that but she wouldn’t even let me talk to a guy SHE WASN’T EVEN INTERESTED IN. 

At this point I was quite mad. 

We argued for a bit and she literally forbid me to talk to him. 

Now I’m no saint so I talked to him a tiny bit but making sure I wasn’t actually getting to know him. I know that was wrong but that is not what I need help with so moving on. 

After a couple days she finally tells me that she kinda liked the idea of him. After about a week she gave me permission to talk to him again but she’s still being all passive aggressive about it. I know what I did is wrong but I kinda think her reaction was uncalled for. 

I really like this guy and hopefully he likes me too but this whole situation is kinda ridiculous. 

TL;DR
My friend is friends with this guy, I start talking to him, she panics and forbids me to talk to him. 

Please help me decide if I’m the asshole. I know I should’ve made sure that she was okay with it but am I really the only one to blame for this mess?