You're welcome... my guess is your friend already senses you have a "special relationship" - just continue to enjoy it together for a while and see what happens... to answer your second question, I think that happens in most relationships (bisexual and not). The relationship grows... we wonder how the other person feels, etc.

Relationships require effort, but sometimes they get ruined when we try to label them and define them.

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Enjoy the journey, not just the destination!