Hello Arshia,
Welcome to the board. I am very sorry to hear of your sad story of deception on the part of your boyfriend. It seems he was very clever in using the skill he has learnt as a Jw (talking ability, charm, flattering etc) to make you feel that you were the one for him. The most hypocritical part was to bring up his religion to you and actually encourage you to investigate it when he had no intention himself to live as a witness is supposed to. This is wicked on his part...he sounds like many "brothers" I knew that were keen to lead women on but quickly dropped them when things got serious.
I hope that this experience does not scar you for too long....not all men are like him. The Jw religion produces many men that are immature and unable to have healthy relationships with women. So I sympathize, I have no real advise other than keep away from him and if you really need the money back that he owes you, then write a legal letter requesting payment by a certain date otherwise you will call a lawyer.
Hope you recover.
Kind regards
Chicken little