Guilt trip or not, you are not obligated to stay with someone when you are not happy. You have a lot of really great things happening in your life and you deserve to be able to enjoy them and enjoy your life. I can understand why you are thinking of the ultimatum and while it may be passive agressive, it may be the only way you feel comfortable doing things. But keep in mind what you will do if he makes some cosmetic changes. I don't know if it would work, but maybe you can say that you want him to stay until April, but then you are moving to Arkansas by yourself. Tell him that while you love him, you know this is something you need to do for yourself alone. Then don't listen to guilt trips, because that's just a crappy form of manipulation. Can you afford to pay your bills if he moves out? If so, I wouldn't drag this out until April.