<human>: Can you give me the gist of the text in a nutshell?

I met my best friend (let's call her Susie) in elementary school, and we have been best friends ever since then. We tell each other just about everything in our lives, and it's a very comfortable friendship. 

Recently, I noticed that whenever there is a potential S/O for her, I always disapprove of the guy and there isn't always a reason why. She also does the same, but she says it's because I have bad taste in girls.

Last week, I invited Susie over (this is not unusual) but when it was almost time for her to go, we started making out/ear-nibbling (that's her biggest turn on, so it was my go-to spot) for the first time during the 6+ years that we've been friends. 

After she left, I remembered that Susie told me a few days beforehand that she felt kind of lonely and that she was considering hooking up with her new friend, Sam (I immediately shut down that idea).

Am I actually attracted to her, or am I just convincing myself that as a result of my hormones, I want her because I'm most comfortable with her? I got almost no sleep the past 2 nights because I couldn't get my mind off of her. I'd like to keep the friendship the same unless it's imperative that we start a romantic relationship.

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<bot>: Just made out with my best friend, I'm scared. Is it just a phase of high school or do I go for the gold?