I have a friend on whatsapp I don't know whether she blocked me or not... But I can't see her profile picture anymore (usually there's is a square icon on the top of the right hand corner) but now it disappeared but I can still see her last seen. Does that mean she has blocked me ?
Try and send a message and if you only get one tick even when shes gone online, then you're prob. blocked. Because the first tick is saying the message has been sent fron your end. The second tick means that your friend's phone has received it.
If shes gone online or she is online and you dont get that second tick, then that means that you been most likely blocked. Or your whatsapps gone haywire