<human>: Can you give me a shortened version of the text?

I'll try to run through the background quickly: So, this girl was the first female to actually show interest in me back in middle school, but I was too nervous to say anything and nothing became of it. We started talking again a couple years later and became super close, texting every day, but I was still too nervous to say anything about liking her until she started texting me about other guys. I told her I had liked her for a long time, etc etc, she told me she didn't feel that way about me but loved being friends. I was crushed, and we stopped talking for a bit which tore me up because alongside liking her she was a really supportive friend, probably my best friend at the time.

We reconnected a few months later and started talking again, and rekindled our old friendship. Best friends again, and now I know her answer. I don't want to lose that friendship again.

Skip to present time. I'm hanging out with her more than I used to now that some things in my life have sort of settled, and it's killing me because I really do love her like a sister, but it's so fucking hard to get rid of those feelings I have for her too. I get anxious and it feels like there's a weight on my chest when she's talking about other guys, and I don't want to feel like that. I lie in bed angry at myself for feeling that way, and sometimes I can't sleep because I'm so anxious about it. She's an amazing person and an amazing friend, and I don't want to lose her but these feelings really kill me inside sometimes.

There are times where I find solace after thinking for a while about how much I care about her and love her in a sisterly way, but it's tough. I dunno. Maybe I'm getting anxious about her with other guys because I don't want them to fuck her over. She's talking to this one guy I used to know, he's an asshole. She told me she probably wouldn't have sex with him, but I just kept thinking what if she did. I don't want to see her get hurt, you know?
<bot>: I guess what I'm asking is how do get a grasp on something like this. How do I deal with romantic feelings towards a best friend? Is it normal to feel protective  and anxious over someone you love like a sister?