Marie,
I am sorry about your miscarriage. It must have been very heartbreaking for you.
I understand how you feel about your boyfriend. You have been together for about a year, have lived together and even were expecting a child for a time period. There are bound to be strong emotional ties and bonds. I would sit down and talk with your boyfriend tell him how you are feeling and your concerns and worries about the relationship.
If there is not mutual respect, love, and trust in a relationship there will be problems. It sounds like your boyfriend is not being sensitive to your needs and is quite distant. I think that you could probably do better. You deserve to be with someone who loves you for who you are, someone you can trust to be faithful, someone who will listen to you and be there for you.
It sounds like these are not qualities of your boyfriend, but perhaps if you talk to him he will change. I won't tell you to break-up or not to break up, but I would think hard about whether it is healthy to maintain this relationship, especially if you will be moving. I won't lie and say that it won't be hard to break up or that you won't still have feelings for him. Breakups hurt. There is no getting around it, but in time you will heal.
Kate