Nope Nope Nope
Talking online won't be enough to guarantee that he's the type of guy you really wanna married. Who knows how he act when you two are not on call? What if you 2 got married and found out there's so many different lifestyle or opinion that makes the both of you fight or disagree? Some habits can't change in just a few days and some won't change. By that time you wanna divorce? Marriage is like a resume you know. Some guy might not like it if you have a divorce. What if the guy abuse you? Many abuse victim have hard time getting out of the situation. Some didn't even get out but instead up to heaven.
So please do not rush into marriage. You have to really know the person well enough. Also need to know their family. Will he take after your side if his family member treat you badly? Will your mother in law like you and treat you well? If your bf a mama boy? You need more information to decide.