17 And Distressed

I'm 17 years old and currently in my last year of college and wanting to go to university to study my first degree in Psychology. I have my whole life planned out in front of me but the only thing that won't get out my head is the fact that I want to be a Mum. My Mum died when I was only 11 and left me heartbroken obviously and alone through my entire puberty with a very protective, but brilliant, Dad. I think this is the underlying problem that is making me want a child so bad, I didn't have a Mum for long so I want to be one. Am I wrong to be feeling like this? I've heard about other people that are in the same situation as me and people have responded saying it's natural but in my head it's on my mind EVERY day. I have several friends that have already had children and I'm so jealous of them, I just want that chance to show something so tiny all the love and affection that I have. My boyfriend of a year holds down a steady job that pays good money (for someone of his age, 20) and finiacially he would be able to support myself and a baby. He is also very keen on the idea of a baby but although I desperately want one something always holds me back. I am completely lost with what I want to do now and this is literally my last resort so please, don't judge me just advise me. Maybe someone that's in the same boat as me, or someone who did have a baby at a young age would be perfect. I see myself as very mature for my age and I love my boyfriend deeply, please don't tell me I'm too young to understand love because I'm not, I've had to grow up very quickly and my emotions have matured as a result of that. So yeah , please advise, I'm in a real dilemma and it's tearing me apart to the point I cry at night sometimes because I feel so lonely and having a child will just complete my life. Thanks.