Just to clarify, I do not mean how to escape the friend zone and start fucking her. But what is the proper TRP way of leaving one of these girls.

I am not currently in this situation but a year ago I started into an open relationship with this girl. She moved 65 miles away (I'm a student so it's even farther when you're broke) and things got strained. We hooked up a few times and then ended up placed in the friend zone. I did some wrong things but that's in the past. Anyway, I'm not the type to have friends who are girls so I stopped texting and calling but my aloofness made her want to talk to me. I couldn't do it so I made sure one day she would never call again. I sent her a hurtful/truthful text and it worked.

What would be the perfect TRP way to do this? Was that acceptable? Any suggestions?