well one thing you have to understand, its not your fault or his its lifes. while many argue this i think it was good for him to move in ahead of time however maybe not so directly.

Your also dealing with the changes that occur that go with getting ready for marriage. Heck even if you all didnt have issues there would be issues you both are used to being single .. im sure theres alot more to it but this is what you both need to sit down and talk about and your going to have to keep the attention span in control while you talk about this .. you both are going to have to give alot for this to work out .. if you both are real serious then you will do/handle what it takes to make it work.