Planing an outing.........?

my own of course so here's the deal, i'm out to only a few people, a couple of my cousins and a really close friend who is a girl and they are all okay with it however i feel it's time to tell more people, i got this friend, jade(not her real name), we used to date but now were both comfortable being friends she has gay friends so she would be okay wit me being bi but i'm afraid that she still has non-platonic feelings for me and she kinda has a big mouth that sometimes she can't keep shut do you think it would be safe to tell her?