Advice please

ok so as the title suggests, I need some advice. So tomorrow school starts and I just found out a share a science class with a ex friend(?) of mine. So some context, in the beginning of freshman year, me and Bella (fake name) were friends. We were somewhat close (we would stay up to text eachother and hang out every period we had together). However, as freshman year went by, we kinda stop being as close. we quickly ran out of topics to talk about so she was more silent; this made me kinda scared bc she was kinda intimidating and I kinda stopped talking as much. it was awkward because we were in the same friend group (I was the same way with the friend group as well) and we had like 3 classes together. So freshmen year ended and, except for a few hallway bump ins, we completely lost touch. I think sophomore year was when I realized that Bella wasn’t necessarily trying to be cold and it was more her personality + with me being less chatty, she wasn’t sure how to go about it either. I was really thinking about it a few days ago and I realized I really regretted not trying to make a greater effort to talk to her and the rest of my friend group. And now (coincidence?) Junior year, we have the same science class. So, like is this a sign from some higher being or something? Should I try to befriend her again? I’m expecting it to be awkward if I do try but I do want to friends again and I really don’t want to be a chicken like I did freshman year. Advice is much appreciated