Never felt this kind of pain

Went on a scuba diving live aboard trip for 5 days on a boat. It was the best 5 days, met my dream girl, the scenery and vibes were beautiful and now that im back from the trip, i have a huge emptiness in my heart. I guess i never realized how much i craved a relationship, im still on my vacation, but its ruined because of that one trip that made me realize i am so lonely. The "what could have been" is eating me inside..