What do I have to do with my emotionally unavailable crush?

Me_and_Myself
I've met a guy online: we didn't have expectations when we started to talk but we both felt a lot of chemistry since the first messages. I chat with a lot of people daily but I rarely have such a connection (he's an INTJ - cold and charming, and I'm the overfeeler artists - the INFP). Me and this guy used to chat everyday, and he started to open in phrases like "I missed you, you're so different and interesting". He's cold about expressing himself in a deeper way, but I still try to tease him mentally and sometimes show my sensitive soul trying to feel him better. But I've understood his style, so I'm always mentally challenging/creative while i try to grasp him. I feel he truly appreciates me like a person because he - even if in his cold and smirky way - often shows me attraction signs like long/mentally intense text conversations. Once I was feeling very very bad, and crying, while he said: nodoby who has feelings for you can ever forget you, you're too unique and special. I know he's sexually and mentally attracted to me, but I'd like to get into his emotional sphere as well 🥺 I started to be more independent lately, and things were going well because I don't give him pressure. Yesterday I said to him, while conversation started to become interesting: I have to go. He: Why do you think I'll leave you go? Me: I have to write now 😉 We'll text tomorrow. So... I felt that he wanted me to stay, I can assure that it was a very exciting conversation. Everytime I text with him I feel a lot of sexual tension and feelings. I don't even know if we could develop something more, even because he's pretty far, but I want to feel it as much intensely as possible. I'm an high sensitive person who loves emotions and passion. So, the problem, is that he is too unavailable and rational, and today, for the first time, he became suddenly cold in texts from one message to another. I really think he's a bit of a strategist because he's overly confident about himself. Advices?
What do I have to do with my emotionally unavailable crush?
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