I think it's about the girl going back to her old boyfriend.
"Focus on the prize" - him saying to look at the "prize" she has now instead of being stuck on the last guy.
"Maybe our intentions were wrong from the start" - She may have found him on a rebound to get over the last guy and he knew this but thought they had something special.
"You said you hate your last love and it's soon enough that you will forget" - Probably her lying to him (and even herself) and saying that she hates him and is over him.
"Forget him, you're what I'm waiting for" - Confirms the above.
As for the chorus, I think "I called you 46 times and you answered on the 47th" means he called her 46 times and she ignored his calls. Her old boyfriend called on the 47th and she answered.
I think it's about the girl going back to her old boyfriend.
"Focus on the prize" - him saying to look at the "prize" she has now instead of being stuck on the last guy.
"Maybe our intentions were wrong from the start" - She may have found him on a rebound to get over the last guy and he knew this but thought they had something special.
"You said you hate your last love and it's soon enough that you will forget" - Probably her lying to him (and even herself) and saying that she hates him and is over him.
"Forget him, you're what I'm waiting for" - Confirms the above.
As for the chorus, I think "I called you 46 times and you answered on the 47th" means he called her 46 times and she ignored his calls. Her old boyfriend called on the 47th and she answered.