Hi. I'm not only a cancer survivor and mom... I can identify with your feelings of loss, as I lost my mom to cancer at the age of 7. i just wanted to say that you can never expect another human being to fill the void that you feel. Your mom is gone, and you need to deal with that. Expecting a boyfriend to make up for what you feel you missed out on as a child is not fair to him, and it is not the way to build a healthy, meaningful, lasting relationship. You are only 18 (?), but if this boy is important, you both need to go to counseling together. You both need to learn where the emotional boundaries are. Journalling may help you get the emotions out, but you need to learn how to deal with them rather than expecting your guy to, and you need professional help for that. If you don't get help with this, the past will eat away at your future, and you don't want that to happen. And I know, as a cancer survivor and a mom that YOUR mom would not want her death to keep you from being a happy, stable, and emotionally healthy young woman.
Good luck, sweetie!
BEV