96 days left and I'm struggling a lot

Hey guys! It is a very fresh relationship and we were together last time a week ago. There is no reason for it but I wake up with so much anxiety. I am constantly worried that I will lose him because of the distance and the time we need to spend apart. I don't know how not to go crazy everyday about it. He is the most amazing and there is no reason to think that other than my fear and past relationships I guess. How do you manage such stuff? I feel like I can't function 96 days is so long :(