How to breakup?

I don't know that I would ever have to ask this question ever, but here it goes so I was on a break with my girlfriend whose prank gone settings wrong and we separated, just then a person started talking to me and I talked too. But I don't know how even without saying this girl is there for me the whole day but I don't know I was like wanted to know her but somehow I'm in a relationship with her and I'm not interested. Now I tried to break up but she literally cried and all which stopped me. And I don't know how to break up 🤷🏻‍♂️
So please help
How to breakup?
Add Opinion