Yes. Off course you should.
I believe it is 30years that you have to keep them for :)
If he says he just wants to be friends that means he just wants to be friends so YES you should believe him.
when the dentist says you need a ceiling that usually means you have a cavity and he need to fill it with cement.
I do believe that you need to see a dentist and not an orthodontist regarding a tooth abscess. If anything, the dentist would treat it or if need be, refer you to a specialist.
i think that if a girl says that you should ask your boyfriend first before beliveing it
Of course you should! Your doctor wont lie to you!
You should ask your dentist. You shouldn't need to replace your retainer at all unless it hurts, doesn't fit for some reason, or your orthodontist says to.
he just wants you to be sure of him
I don't know that you should necessarily believe "every single thing" that any one says, let alone an ex.
In my opinion, I don't agree you should believe in Bigfoot because even though researchers says Bigfoot is real, there was not actual PROOF that he is real. I may be wrong, but I disagree that you should believe in Bigfoot.
To believe in him requires you to trust with your heart. But if in your heart you believe otherwise, follow your instinct.
You should believe on the lord Jesus Christ and you will be saved from your sins and then on you should do what God says and believe him that he take care of you through your tough times you have that is wrong with your life.