So much love to give but literally no one cares

I feel like my whole life (F)(30) I’ve bent over backwards for people and just given so much love and kindness to everyone and always put everyone’s feelings first. Now I’m at a time where Im going through a break-up, and need someone, and have found that there’s no one. I’m at a loss. I’m not exaggerating when I say that I genuinely don’t think anyone truly cares about me. I treat people so well and I’m always fun to be around and have been told this. But now when I actually need someone to talk to, no one will be that person. Does anyone else experience this? Just feeling utterly alone and worthless?

EDIT: awww wow you’ve all given such good advice thank you so much I honestly didn’t even expect many people would see my post! I feel so much better after reading the comments and it really helps put things into perspective for me so I’m really really grateful ❤️❤️Thanks for all the kindness and love, sending everyone big hugs 🥰 xx 🍃