You sound like you two are quite young. I am curious as to why you needed to break up with him rather than just lay low for a few weeks for studying? It sounds like he might be the type to want a whole lot of attention, even when you can't afford to give it? You did the right thing by doing what you had to do to focus on your exams. If you still really like or love each other see what you can do to work it out. If you find that one of or both of you aren't feeling the relationship anymore, keep your options open to a new boyfriend.