If he says "next time we see us will be the last one.. Why he wait a lot?

My friend with benefits said next time will be the last for us... But when i told him when we can see us... He never proposes the day... He just said "we gonna see us but I will go to the dentist I couldn't" then "we gonna see us but I don't have enough money for the love hotel" then...

Why he is waiting to the last time?

If he says "next time we see us will be the last one.. Why he wait a lot?
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