Criticism for only being 20

I've mentioned how badly I want a baby to family member and friends before, and they all seem to think I'm too young. Not in the sense of financial or maturity, but just because they say I need to go 'do what I want in life before' Well just being a mom is what I've been wanting for years and now that me and my long term bf have our careers set, bought a house, who's to judge us? I guess I'm just wondering if anyone else has to deal with being told 'oh you're too young' and how you would respond to judgemental family members..