Ex and bestie 😬

So basically me and my ex broke up about two weeks ago and now I feel like him and my bestie are flirting a lot.Idk if I'm imagining things but it's always happening.She doesn't like him and he wouldn't stand a chance with her anyway but it still bugs me.One of my other best friends had the same problem when she broke up with her boyfriend....they ended up flirting constantly as well.

I'm just not sure what I'm going to do

I still love my ex as well,the whole thing was a mistake and I really want to get back with me but he said he wanted to "let the relationship go but not the friendship".So I'm wondering if he said that cause he likes her....?

I'm sorry this is rather confusing😬

What do you think I should do?

Thanks❤️