my best friend is moving away for uni. how do I cope?

alright a little context here, since our relationship is quite a complicated thing to understand.
me (20F) and my best friend (20M) met when we were 16, and we fell in love and dated for almost 3 years. it was quite a risky period to have a relationship as 1. our parents didn’t know and they wouldn’t have allowed it either if they did know 2. we were both working for an important exam that’d decide our university entrances and career.
after the exam ended and we knew our results, our relationship changed. he decided to go abroad while I decided to stay here due to money issues that comes with studying abroad. it went from dating to best friends. where he wanted to have a neutral outlook as this was a big step And we didn’t know what the future would hold. he wants to not stress about a relationship but focus on his studies and achieve his goals.
we are still very very close, his family is also very closely associated with mine. he’s going to be moving in a couple of months, a few weeks after another important exam of mine. I don’t want to bother him too much about telling him how much I’d miss him etc. but I’m really down at the moment, it’s hard to concentrate on my studies without breaking down crying. I still love him immensely and want nothing but the best for him.im not sure whether he loves me in the same way as he did before, or is just holding back emotions for the sake of reaching his goals without letting his emotions in the way. could anyone help me out with some advice on how to cope with this situation?