im a mistress....help

Hi, I'm new to this website and your the first person, I'm asking for help. You see i can't find somebody in my family who I can reallly talk too. I'm 18 years old and i met this wonderful guy who has a daughter and a wife. We started talking on the phone and I immediately connected with him, but then he told me that he has a daughter and a wife. The thing is that he married her so that he'll be legal in the U.S. Hes willing to leave his wife but I just finished high school and he wants me to wait when I'm about 20 so his and my family can meet.

So whats your advice on this suitation? Thank you!