<human>: A little while ago, my (ex)friend contacted my boyfriend, saying that I had made a racist comment on reddit which offended her greatly, and said that I am no longer allowed in her home (she is originally from India). This 'racist' comment that I made wasn't even aimed at her, and I didn't mean it to be offensive. I was simply talking to someone on a thread about people from India/Asia moving to the UK and US as an interest, I wasn't being purposefully offensive. Also, you should know, that this comment is the only thing I've ever said in my life regarding races. Anyway, I tried emailing her, apologising and saying that I didn't mean to offend her, and that I've deleted the comment, but she is ignoring me. And now she keeps talking badly about me to my own boyfriend! She has been insulting me and telling everyone she knows that I'm a racist. This is very upsetting for me. I've never insulted her and we were good friends for just over a year, and now she is making things so difficult.

Also, this is not the first time she has been argumentative towards me.

What on earth can I do to resolve this?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: ! (Ex)friend is accusing me of being a racist, and has decided to talk about me in front of my own boyfriend. Making things very difficult for me.