I've been in a very similar situation, only I was the one who broke up with my boyfriend. We live 2 hours apart. He also doesn't have a car or a drivers lisense. We were both also very busy and could only see each other every 3-4 month and that was very diffucult for me. We weren't at a point whever we said I love you to each other and I didn't want to fall in love with him be hurt. We stayed friends and still talk to each other everyday online but I haven't seen him in 6 month already.
I think that you should talk to your ex before he leaves. Long distance relationships are really hard. Maybe you could at least stay friends for now and see what happens. If it is meant to be then it will happen. But if he rejects you, dont sit and wait for him, try to move on .