mixed signals or just assuming?

i've been crushing on this girl for a while now and i've been trying to find out if they like me or not. It's so confusing, but i mostly think im just assuming, we only talk in chat or in group projects. I'd regularly stare at her when the class is absolutely BORING AF because she is the only thing interesting at this point, and when she catched me staring at her, she would smile, THAT MADE MY FUCKING HEART JUMP OUT OF MY CHEST, i'd said this before in my other posts, but id like to say it again, SHE HAS THE MOST BEAUTIFUL SMILE I'VE SEEN IN MY LIFE; its just so contagious and cute, but when were chatting in messenger, sometimes she is a dry texter and doesn't reply like 10 minutes after i replied to her message— and sometimes her text are filled with personality. I don't know what to feel, am I just assuming? Or does she actually like me back?