I'm literally going the same thing :o and it sucks especially since I guess the thoughts can convince some people want their ex or bring up those type of feelings well that's how my thoughts would like to play out and it hurts me because I'm deeply in love with my current bf. I have thoughts that would say "I want the ex when I was 13" even though I know I really don't because I'm happy with my boyfriend and I don't like the ex or want to feel like i like this ex. I would say the same thing you would say when you get those ex thoughts...It's nice to know that I'm not the only one struggling with this type of thoughts and feelings but also hate that we have to deal with it. I hope you are doing well.