It is unfortunate but sometimes relationships do not begin due to timing. Many people have these strong feelings but timing prevents a relationship from happening. Try to not focus on that brief moment but instead on what happens now. You have tried to encourage his advances and waited - that is not helping. Instead lay the groundwork for a relationship through your behavior. Create an atmosphere that shows him you are interested only in romance. Sometimes it takes something really brave to push the envelope. At the very least he knows you are certain of your emotions and want only a romantic relationship. Set a romantic atmosphere that really sends a bold message.
You can't force what he doesn't want but if you are creative it says that you are not interested in friendship. At some point you have to accept what he wants but I would be very creative first. Then you know he is not willing to change his mind.
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