Did I say "I love you" too soon?

Ok... so here's he thing. I met a guy online and we were texting nonstop. We know so much from each other and have lots in common. Similar tastes, way of thinking, pet leeves, kinks, and so on. From a good morning to a good night we were always together (via text). He lives in the US while I'm in Puerto Rico, so I didn't have any kind of communication with him for over 3 weeks. After that I texted saying I'm safe. He replies and everything goes back to normal. I text him whenever I can and he replies without hesitation. I told him that I wanted to know how he felt about me. He said something along the lines "I care for you deeply and have very strong feelings towards you". So I was like... Yey. And after 2 weeks I said "Love you, goodnight." He said "I know". Like... for real? I ignored it since he shows he cares in other ways, but about 3 nights ago I said "Love you. Take care." He read it but hasn't responded at all. Maybe I'm just freaking out over nothing... or maybe he freaked out. Did I use the L word too soon?
Did I say "I love you" too soon?
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