Went on a date with an 18 year old HB9 virgin who has been in a relationship for 4 years, she is still dating this dude and never had sex. She initiated to meet with me twice, in fact I actually ignored her advances for a long time. Finally I said fuck it and agreed to get coffee. She insisted that she only wanted to be friends. I told her I was not looking for friends and had plenty of those. She responded with "that's too bad, the best relationships come from being friends" smh. She refused to call our interaction anything more than just friends hanging out. On the date I initiated kino, played with her hair and she seemed to respond well to it. However everywhere we walked she seemed to keep a small distance between us. When I went for the kiss she backed up and said she still had a boyfriend. I refuse to be a beta orbiter and told her nice meeting her but I do not think we should meet again. She said ok and that was it. Should I have taken it slower or maybe just left it as is instead of shutting everything down?

Edit: To give some more context, her mother knew me from work and I had never met her in person until this date. She went out of her way to talk to me.