You should never share your misery and disappointment with the cause of that hurt (HIM), but with your best GIRL friend, because what you really need to accept and regroup from this experience is love and support. He cannot give you this. LEAVE him alone.
Further contact with him only keeps the old feelings that are still intense stirred up and raw as you are finding out the hard way by INITIATING contact yet again. Your fear of rejection came true, and it has changed YOU, not HIM, or the circumstances. If you allow YOURSELF to heal without HIM, you will eventually gain STRENGTH back through ACCEPTANCE and be grateful the cycle of feelings for him can fade back into fantasy. Yes you have been feeding the fantasy for MONTHS, and it always hurts to know you must STOP.
For his part though he should leave YOU alone (I would) to allow you to process and deal with your disappointment! See this as a TEST of whether this was a TRUE friendship in the first place, or YOU keeping it alive, for your own fantasy feelings and building false hope for more.
Yes this hurts and the pain is difficult to deal with, and leaving him alone, NO MATTER WHAT, is the hardest thing you have ever done in your young life, but this is your test to pass or fail, to heal, or keep misery alive.
Now call that best girlfriend and start your healing. Cry it out, and get back to living your life to the fullest, and enjoying exploring ALL your options and opportunities that life brings you.