How do I get over this unavaliable guy?

Well, I have been down this same road myself on more than one occasion and I am afraid that there is simply no remedy but the passage of time. Time heals all as it has been quite accurately stated and you simply have to face this fact and keep going forward with your life. However, fate has strange ways and you can never really know how this situation might turn out in the end. I really hope that this will be of at least some small help to you.