Just need to vent a little

Ashley • Proud wife, mom, bonus mom (step-mom), and physical therapist! Expecting baby #2 February 2018. Loving my hectic life!!
So I'm a little discouraged. Most of my good friends are not married and still in graduate school (I just finished in May). Whenever I bring up TTC they say I'm crazy for wanting a kid, or I need to be married longer before TTC, or I should wait till I'm a little older. I feel very ready to grow our family. I really want to give my husband a child as well as give my step-son a brother or sister. I know everyone is entitled to their own opinion but it is just frustrating. Am I crazy for wanting a child?!?