That's no poem, 'ight?
Whatever ... This is a tricky situation, and I don't know if I can help you, but since you posted your problem here I assume that you want some answers to your post.
For me, it sounds as easy as that: You loved each other? Which means you talked about it back then right? If you have, then I see absolut no problem in talking with him again. Furthermore his behaviour of not saying hello to you seems to be a sign that he is kinda nervous too. So maybe he tries to forget about you because he thinks you do not like him anymore? If it is that way, I'd seriously consider talking with him. Other than that, I can't really think of any proper explanation why he doesn't want to talk with you.
Even if I'm babbling complete bullsh*t and none of this is right (which can easily be the case actually), I still think you have to adress him with your thoughts. You have to speak out on it.
Maybe it'll end bad for you (I really hope it won't !!!!!), but I believe it is better that you know it, instead of being worried about it. You shouldn't feel like crying all the time. If you know it, and it is a bad situation for you, you might cry ... But you'll stop again, live on eventually and find another awesome guy. But staying as you are is neither good for you, nor for him.
That's just my advise. What you do with it is completely up to you. I hope I'm able to help you a bit with it. (: