In the above condition, you can file an FIR against both of them for the offence of cheating, extortion and criminal intimidation. Your friend Amit by a deceitful act took away money from you. His friend Jaspreet was also involved in this case as a conspirator.
They have committed the crime mentioned above, and both are equally liable for that. However, it is not clear who was in the necessity of money at that time. Whereas, the Jaspreet admitted through her conduct that she knew about the transaction of money. At the time when the Jaspreet made a false statement that Amit is hospitalised, her conduct proves that she was aware of the incident.
No doubt there was a conspiracy between the Amit and Jaspreet to take money from you with no intention to make repayment. If the person takes money with the intention to return, then he commits no offence. Because he had no dishonest intention at the time of taking of the money.
But when the person had a dishonest intention at the time of taking the money, he commits the offence of cheating. The cheating is a cognisable offence. Therefore, you can file FIR. However, the cheating is punishable with imprisonment up to 7 years, so the rule of limitation does not apply. Consequently, you can file FIR anytime without explaining the delay. It would be best if you wait until 3rd August.
The proof about the transaction of money is a good piece of evidence. You can use this evidence at the time of filing the FIR and also in the trial.