很高兴认识你 的翻译 有好多种
入门级表达：I am glad to know you!
I am pleased to know you!
可以略作：Pleased to know you!
Glad to know you!
超级表达：It's pleasure for me to make acquaintance of you!(我写书信的时候愿意用这句,书面化强）
再来点相关表达：
1.I’ve been wanting to meet you for some time.很久以来我一直想见你.
2.I’m delighted to make your acquaintance.认识你我觉得非常高兴.
3.It’s a privilege to know you.认识您是我的荣幸.
希望我的回答你满意