I was in a long-distance relationship with a woman who lived in Sydney (I am on the West Coast of the US). There was a lot of travel. A lot of waking up at 230 in the morning to call her at a time convenient for her and her work. Email and texting helped. We loved each other, clearly. But at the end of the day, we both came to the conclusion that the only way this was going to work in the long run was for us to live together in the same city, either Sydney or Portland. She was happy to move to my town. I was happy to move to hers. The only problem was, we both had young children. The custody situation was just way too complicated. Long story, but we ultimately ended it. I still think about her, 20 years later. She could've been the one. it still makes me sad. All the time.

Fortunately for you, PR is a short flight from Miami and you could conceivably go down there to visit him. Why haven't you? It might demonstrate some commitment on your part and since you love him, that might be a good thing. Whatever the case, I do believe you two must endeavor to physically see each other regularly, or this is going to be very hard. Relationships take work. Long-distance relationships take way, way more work. That's my experience, anyway. Wishing you all the best.