Advice tosave tooth

I was unfortunately born with 3 baby teeth with no adult teeth underneath, they have never given me trouble until I chewed a damn hard piece of food and cracked one. The dentist put bonding and all was good however it’s still sensitive when I eat almost like I can feel the bonding against my inside gum if that makes sense. It doesn’t “hurt” it’s just an annoying feeling. He said I need to extract it and put a Implant. I can’t afford an implant anytime on the near future. So this would leave me toothless in a visible area. The tooth doesn’t even require numbing shots to bond and rebond. Do I have any other options I can ask for? Do they have some kind of root canal or maybe just something to kinda deaden that nerve and bond it and let it last as long as it last may be months may be years then I’ll have no choice but to get an implant.