<human>: Can you provide a brief rundown of the text in within 3 sentences?

We've been friends for a really long time, we've known each other since Primary School. We lost contact for a bit during Middle School, but reconnected again in High School and have been great friends ever since. I love having her as a friend, I wouldn't trade her for the world, but sometimes things feel like they're getting out of hand.

I should mention that we're not dating or anything. I've clarified that with her in the past.

The worst incident that I can remember was when I tried to start up a romantic/sexual relationship with someone I met online. We met, hung out, got along really well. I loved spending time with him, and I planned to continue and see how things worked out, but got stopped in my tracks pretty fast. It wasn't that my best friend flat-out told me that I 'couldn't see him anymore'; she's almost never that straight-forward. While I'd been out on my date, my best friend hadn't been able to contact me to ask me to come home, and was freaking out about it. When I got home, I ended up going to her place almost immediately to try and calm her down, only to find she'd cut herself in her distress. Not deeply at all, she wasn't in any danger; I got the cuts cleaned and bandaged as I calmed her down.

While I can't remember her exact wording, it was heavily implied in our following conversations that she would very likely do this again if I went out with him again. (She has a history of repetitive self-harm, so I don't doubt that it could/would happen again.)

I value my friends more than any other part of my life, but sometimes I wish that there could be more *to* my life than that. I don't want to just... stop being friends with her, since incidents like this don't happen often, and I love spending time with her normally. She's very supportive of most of my decisions, she's gotten me through a lot of shitty times, but this. I don't know how to handle this side of her that comes out when I try to do things for *me*.
<bot>: I have a really awesome best friend that sometimes flips out and gets Overly Attached when I try to expand my social life and I don't know what to do.