@Queerantine - Oh hun… (big hug!)
I don’t know whether you’re asking for advice here or simply needed to tell somebody about the predicament you’re in just to get it off your chest a bit, but I know where you’re at - been there - and it’s so hard to be that person, isn’t it! I’ve fallen in love with friends, made the mistake of telling them, and lost them as a result. I’ve also been on the receiving end of it (a FWB fell for me and became horribly clingy and jealous. I ended up having to cut myself off from him, and in so doing lost a unique and lovely friendship).
I think that, deep down, you already know the answer to this dilemma. You said it yourself: she “finds it incredibly uncomfortable when people develop feelings for her.” That’s the hands-down deal killer here. No matter how kind and open-minded she may be, if you confess your feelings to her, it will weird her out - and no, she won’t be hostile, but she’ll never again be able to feel totally relaxed and open with you. It could result in the two of you becoming gradually more distant and awkward with each other until one day you realise that all of that great thing you had as friends has somehow evaporated - or her reaction could be more immediate: she could decide that it’s kinder to you in the long run for the two of you not to see each other again, even as friends.
The stock advice on “how to kill a crush” is “don’t see them any more and busy yourself with other things” - but that’s no use at all when one is crushing on a valued friend …and of course, as you know, one of the principle drivers of your crush is the fact that her aromanticism makes her unattainable. Oh how we romantics love an unattainable goal!
Also, I think a lot of the reason you are crushing on her is down to the fact that she is your “best (and if I’m honest, only) friend.” - OMG love… she’s your ONLY friend? That ain’t good. It means that you have no choice but to put all your emotional eggs in the one basket: you literally have nowhere else for all those different emotions to find a home!
So (just in case it was advice you were looking for ) I think what you’ve got to do here is be very, very grown up: lock that crush in the basement room marked “stuff that’s no damned use to me”, throw away the key, be grateful for the friendship you have with her - and meanwhile, actively pursue love elsewhere. Again, you said it yourself: “doing something I know is likely to distress her, solely for the sake of getting it off my chest, seems awfully selfish.” - It is.
Tough, this adulting lark, isn’t it?
Hugs,
PD x