desperate for affection

I'm almost 18 and I've never had a boyfriend. I've never held hands with a guy. I've never gotten so much as a hug. I am kinda shy, but I have made moves on the last few guys I've liked and always get rejected. I just want someone to hold my hand and to talk to but apparently that's too much to ask for. No one understands. They always say "you'll find someone😊" but I've been waiting so so long. Idk what I'm doing wrong and it's exhausting. lately I've been crying myself to sleep because I can't stop thinking about how nice a kiss goodnight would feel and despite me telling myself it will happen soon, it doesn't. Help?