how do i talk to boys?

so like i’m 17 & when i say i have no life, i mean i have no social life. a few years ago, i would’ve been the one to make the first move. i was an outgoing little girl but ever since i found out my dad was cheating on my mom, i wasn’t happy. i shut myself out & i became a shy person. i waited for people to talk to me bc i wouldn’t dare. now, about 3 years later, i have begun to speak out more & little by little i am becoming myself again. although i’m almost there, i need advice on gaining my confidence to talk to boys again. i’ve had many crushes but i haven’t had the confidence to talk to any of these guys.

any advice?