Hope vs fantasy

I loved your podcast on hope and totally agree with taking action instead of just hoping things will happen.
What are your thoughts on fantasies? I don’t mind escaping to bed at night and fantasizing about a guy I have a crush on… and just realised how that sounds – not in a sexual way, just in a romantic situational way. Unfortunately he’s with another woman so not available to me. If we enjoy a fantasy is it just buffering?