We have been friends for 3 plus years kinda best friend….i like her a lot🥹
But i’m afraid i’ll lose her….uk the friendship
with this little info I'd say ask her out, but
if she declines then it's not her responsibility to make you get over her(!) (I think that's a main way your friendship could break, I myself would and did distance for 2~4 weeks and pick stuff up afterwards again)
Also some people love being chased a lot, make sure to properly do that before you ask (I think go have some dates meetups that subtlely decrease in plausible deniability about your feelings), so you won't be second-guessing any refusal she makes. If she refused you at your best, it'll be easier to get over her. (source: I just made this up)
If she's allergic to hidden schemes, then be upfront about your feelings. Though don't go start believing she doesn't like your secret effort because that means you have to do less work for it. You'll have to be at your best anyway. (same source)