太早起床了-in oral Chinese , u also can say ---大早起床

我现在在上海虹桥火车站，等待去杭州的（火）车。---等待去...的车 can be more briefly ex:候车

我跟女友和她的妈妈坐着。---坐着+someplace is better

我以前去过苏州但还没去过杭州。女友的妈妈今天也是第一次来上海。我们想去（计划去）看西湖。 昨天有个（also一个）朋友告诉我西湖那里有幢很高的大厦，景色很漂亮。 

I'm at Shanghai HongQiao Railway Station, waiting to go to Hangzhou. I'm sitting with my girlfriend and her mother. I've been to Suzhou before but not Hangzhou. This will be my gf's mother's first time outside Shanghai. I'm looking forward to seeing West Lake. Yesterday one of my friends told me about a tall tower at XiHu from which the view is very good.

very good , please pay more attention to vocabulary & sentence can be completed ex, 去过，等待...