Young lady, I cannot say I have ever had an abortion. However, years back, a former girlfriend was forced by her parents to have an abortion. She has never told me what it did to her, but I know it was difficult. I am sorry for your abortion. Being an abortion dad, I cannot say that I have nightmares about that baby, but I do think about him or her. If THAT child is forever on my mind and I never CARRIED THAT BABY, then, I know it must be difficult for you having carried that baby inside you. If all situations are good as far as money, jobs, etc. then maybe you should have another baby. It could be that you are trying to replace that child with another one. If so, then, maybe you two need to wait a while. Discuss it together.
I can understand your apprehension as to thinking someone will steal your baby. It is directly connected to your past abortion. No one will steal your baby. The mind is often fueled to play tricks on you when there is such a trauma to the body. I pray that the fear will leave your life. I pray the wound to the spirit of your mind would be healed. It can happen by the power of prayer. Things will get better.
It would seem this young man really cares a lot for you. If he has stood by you all this time, then, if you agree to it, then he should marry you. I know.... One thing at a time. Yet and still, if you guys love each other so much as to bring a child into this world, then why not do that together as husband and wife. If you can live in the house together, then you should be able to be married and stay in the house together. Yes, marriage changes everything, but it is the order of the universe. Discuss this, if you haven't already done so. Things will look up for you two.
bwade