pretty i said:am i the first person to wish you have a happy

pretty
i said:am i the first person to wish you have a happy birthday-__-
he:yeah haha
pretty much
thanks :)
里面的pretty much
我是问他我是不是第一个祝他生日快乐的人，他说是，可是后面来个相当多是什么意思，难道说在我之前已经有相当多的人祝福他了？