Missing my BF!!

My BF and I talk A LOT but sometimes it still feels like it isn't enough. We've always been long distance and he's visited me 3 times and each goodbye has been harder than the last. I don't know if this time was harder because he met my family and it felt "realer." He fit in and even my dad liked him. We cooked together and danced and it was a great thanksgiving. He goes to school and works and I'm in school so we're both busy at night. Even when I'm getting work done I can't help but miss him 😞 my heart hurts. I've never been the type to really miss people or get attached but this is different. How do some of you cope?