Did I overstep by warning a girl I like about creepy guys in our group?

There's this girl I like in a shared social group. We've spoken frequently on the phone, went on a date; she said a while back, though, she just wants to be friends; I maintained that I liked her, and we gave each other some space... we're talking and having fun again, now, though. And while I do sometimes wish that we could be more than friends, I'm also not confident that we'd be compatible if we were partners.

I have caught her, though, getting visibly annoyed when I'm talking to other girls; and I've also caught her staring at me, more than once. Which is to say--her feelings seem to be complicated? At best?

A couple of the other guys in this social group are fixated on her, though, in ways that I'm not confident are healthy. One of them brazenly asked me for advice on how to "get with" her, told me he was threatened by how close we seemed, and bluntly said he would "never stop" trying to interfere; and I recently found out the other guy has a history of getting laser-focused on women, and becoming increasingly unsafe toward them as time goes on.

I warned the girl about both guys--but I'm worried it came across as me being possessive, especially since she knows I once had very strong feelings for her. She seemed visibly annoyed after I told her about the second guy, and physically put distance between herself and me, after "volunteering me" to walk her to her car, in part to get away from that guy, with whom she was just speaking.

I'm a little annoyed, because the sense I'm getting is that she likes male attention, while also being naive to how dangerous some men can be. She's talked about how her best friends grosing up were all boys, and how she misses being able to just pal around with them.

Did I do the right thing by warning her about them? Am I coming across as possessive, given our history?

Did I overstep by warning a girl I like about creepy guys in our group?
Post Opinion