He talked about children....

My boyfriend of 1 1/2 years has talked about having a kid with me. I'm 17 and he's 18. We are graduating in a few months and he wants me to go live with him in New York where he is going to college. He tells me there are plenty of community colleges around (I don't know what I wanna do yet) and we would be together and we could start a family. He wants a family. I don't know what to think or do.