Just saw my high school crush on bumble. Back then I was overweight and she was one of the ‘popular’ girls so I never pursued it. Should I pop up?

Now it’s been almost 4 years since we left, I’ve shed a ton of weight and look a lot better than I originally did imo. I’m still nervous about doing it as how do you pop up to someone after 4 or 5 years with the intention of asking them out?