how do i become friends and slowly make this guy inlove with me?

ive been thinking about this for a while.

the guy i like is my little sisters’ friends’ older brother. my sister and his sister is the same age, him and i are the same age too. he sits next to me in a certain class, and we’ve had a few conversations a few times—either about games or just school. but we’re definitely not friends or anything.

ALSO, im highkey ugly and not really his type. im a pale asian, and hes into tanned skin asians. also, im really weird. like REALLY weird.

i think i have an advantage because of my sister being friends with his sister. he knows that sometimes i supervise his sister when shes out with my sister, which i thought would maybe bring us closer. but no, im still a stranger.

im painfully aware that confidence is the biggest change i can make to this. i just need advice out of that area. i want to become his close friend, then slowly his lover. what should i do???