Is This Soon Too Soon?

Okay, I`m 18, almost 19 and I`ve been telling my boyfriend for almost a year that he cannot ask me to marry him. I love him with my whole heart and I`m really starting to look at marriage. One of our good friend`s is married and having a baby and I must really be caught up in baby fever because I really want a family.
I told my boyfriend this and told him that I`d like to be married by the time I`m 20. That`s in two years. We are both in college and still will be in two years. Is 20 too soon to be married? Is it really a ridiculous age to look at?

Help!
Emily