First of all, there is no size limit on bikinis. You can be 800lbs and wear a bikini of you want to. It's your freedom and don't worry about what others think.
Now, for ME, personally, I would need to see a photo. I know you don't want to but I hate not seeing a photo. Going from your height and weight, you seem fine. Your body shape is "triangular" but you're bigger chested? Did you mean to say UPSIDE DOWN triangle? So I'm assuming you have a large bust, small waist and small hips? If that's the case, that seems just fine for a bikini.
So, going by your height and weight, as well as your body shape (at least what I think you're talking about), I'm sure I would think you look fine in a bikini.
Your never too 'big' for a bikini, love your body! :) Because its beautiful and im sure you will look amazing in a bikini, please be confident with your body cause Im sure your going to be awesome on the beach! :D