I'm going to break up with my girlfriend over a text message.
I'm not sure why anyone would ever want to break up with someone over text?
There are reasons why I think this is the best way to break up with her.
It's ok if you want to break up with your gf. But also it's rude to tell her just over the text. You should meet her in person to let her know your decision.
Nah, I think I have to do it this way. It's going to be more complicated if I meet her in person.
It being complicated is why you do it in person, because if she meant a lot to you then she should be worth an awkward personal explanation on why you believe that it won't work out.