What is the best way to break up with someone online?

I (f20) have been talking to this guy (m34) in another country for a week. We talked about Zoom stuff, but I didn't feel comfortable with that and we didn't want to spend too much money on a first date. I forgot to mention that he is in the US and I am in Germany. He is married but separated and I am single and never been in a relationship. Now I feel too bad to continue with this, but I don't know how to end it. I'm tired of waiting forever and I also don't know how I would feel if I ever met him in person.<br><br>How would you do it?