Will take too long to reply to each piece of advice so thank you all for those who did. I'm 22, she's 20, and as far as age is concerned in relation to marriage, I guess a few years down the line would be better, but I did mention the pressure of my parents are immense and they already know about her and my intention to marry her. Another risk of breaking up with her would be my parents reaction.
It seems like I painted a bad picture of my relationship with her which was unintentional and totally nothing to do with the fact that I was currently in an argument with her

Some of you seem to have taken offense with what I said that she's great in that she'll do the things I don't like to do. This is actually something she always talks about, how that once we marry she can iron my clothes etc. They are trivial things really and I find myself liking her even more in that she would find so much enjoyment in doing these things for me. That's all I meant by this.
I can also add great listener, great under the bedsheets, and has motherly qualities that I also find very attractive about her, so I'm sorry for the bleak picture I painted about us.
I guess the problem only reallyy lies in raising my children. I did speak to her about this since my initial post and she really dislikes talking about my apostasy, it's something kept locked in the basement really.
The talk was good however and that I don't need to pretend to be a Muslim in front of them was the end product of our talk. I'm pretty sure that my children raised by a let's say very relaxed and modern Muslim and a father figure who doesn't associate himself with any religion will give them a whole lot more freedom than I ever had as a child.
Once again thanks for the great advice guys and I'm sorry about some of the misunderstandings I created. Let's hope she stays true to her word.