delulu is the solulu, nah im joking. im assuming ur a guy, if your a girl ill change my answer, so I think the best thing to do is continue this eye contact thing, because she's lowkey showing interest by the sounds of it. now, what you need to do is exude confidence, girls LOVE confidence from a guy. show her you want her without being too much. for example asking ur friend thats friends with her to ask if shes interested, poor move. lack of confidence, beta male vibes. go up to her one day and just speak to her, your in the same class, talk about hwk or sum, befriend her, then once your friends and your comfortable, start flirting. usually girls can like someone quickly, even if they werent interested first. if you flirt well and show your interest, she'll come around. again assuming ur a guy, YOUR A MAN, take the lead and show ur interest, ask for her socials, message her. but do all these things without coming across as desperate. let her know your interested, but not TOO much, downplay it. this lil part may be a bit toxic, so take it pinch of salt, when she's slowly starting to reciprocate energy, back down slightly, e.g maybe like dont message first or something, she's gonna be more intrigued that way, and start being even more interested, girls work in a complicated way. BUT only do that for a lil bit, you dont to drag it on and then she loses interest. anyways, once shes super interested and proper likes you, there we go! ask her out, job done