Its a shame that you are going through this. In a way this could be a blessing. If he dropped out on the notion that "he just doesnt make you happy" then he was either out of the relationship already, or he isnt able to handle being with someone that has MI. Collect your thoughts, breathe deep and keep walking forward. He will either see he has made a mistake or you will find the person that you deserve to be with. Keep your head up. Good things will find you.