It's always hard to break up with someone you love deeply - I know, I've been there many times (and have shed plenty of tears). If you feel it is best that you stay together until after your exams then so be it, but I think you are setting yourself up for even more heartache by holding on to the hope that you will be able to convince him that he loves you enough to stay with you.
He's already told you that although he cares deeply about you, he doesn't love you in the way you obviously want/need him to. You can't force or convince anyone to love you (I learned that the hard way with my ex husband). I was devastated at the time, but once I realised this, I was able to move on and find someone who really did love me, the way I wanted them to. By holding on to this person and being unable or unwilling to let him go, you are actually closing yourself off to other opportunities and future happiness with someone who really will love you the way you deserve.
Of course, you will mourn the loss of your first love, but that's just it, it's your FIRST love - there will be second, thirds and possibly more in your lifetime. Your single days can be spend discovering more about yourself and spending time with other friends which can be soooo much fun. Each relationship you have will bring you that much closer to THE ONE, and will allow you to learn about how you act in relationships and what you want/need in order to have a long-term one.
I'm not telling you to get over it, because it's not as easy as that - but there is soooo much out there for you, you're just at the beginning of the journey. He's not the one for you, but you will find your man in time, just like I did! Good luck with your exams, and gather your friends around you as you will need them at this tough time.