What happened with my cyber boyfriend?

I have a cyber boyfriend. He is from pakistan and much older than me. But we got many similar ideas and dreams, thats why we decided to be in relationship. He was engaged with a woman when we started to communicate by facebook. Actually i already knew him from 2 years ago by chat but i ignored him since i didnt interested with him. After that, he told me that he has big problems with his fiancee. Time goes by till he told me that he now not longer engaged with that woman. After a while, we crushed on each other. We were chatting all the time, talking on the phone, and seeing each other through webcam, beside that he sometimes sent me money,but i never asked it, i SWEAR. He said he just want me happy and able to buy things i want. One day,he also asked me to get married and i told him he has to wait for other 5 years since im still studying in university right now and after graduated next year, i want work. He agreed with that and he (said) his mom is so happy and started to prepare for everything. His mom also want us to be engaged first, but he said its impossible because i'm still a student. Then a month ago he said he had to go to Dubai n London to check his companies for about 15 days. He promised by the name of God to contact me everytime when he is free and will chat with me whole nite. But now, it's already a month, he just lost like a ghost without any news at all. I'm so worried and missing him so much. But his numbers are inactive (he said he will buy new numbers when he reached those countries) till now, and he never answer my email. This week i see him online, but he doesnt answer me AT ALL though i sent him many msgs. What should i do? What can i do to make sure that he is alrite or maybe actually he is just playing with me? But if he just played with me, why he sent me money and bought me webcam and talked to my mom bout his plan to marry me?? Please..help me to answer thiss.. :-( Thanx before ppl