I think the wording is wrong here. The post makes a lot more sense if you replace the word "friendship" with "relationship". It is quite possible that's what

I think the wording is wrong here. The post makes a lot more sense if you replace the word "friendship" with "relationship". It is quite possible that's what the author actually intended to say, but for whatever reason (brain cramp, poor English, whatever), ended up writing "friendship" instead.