As someone who runs events, I try to engage with people who are there on their own because I've been that person who feels awkward and alone before and it's not fun, I know! But as others have said, the chat scrolling can get a bit much so I would also suggest sending a tell. The sound and the colour are a surefire way to get attention. Of course, you may still come across people who aren't interested for whatever reason or another, but I think in the majority of cases, you aren't getting a response simply because it was missed.
Edit: I'd also suggest using <t> when you emote at someone. I know it pops out at me when I see my character's full name in something like, "X smiles at J'inarah Marad."
Edit: I'd also suggest using <t> when you emote at someone. I know it pops out at me when I see my character's full name in something like, "X smiles at J'inarah Marad."