I feel like maybe I am and I haven’t mentioned it to DP... yet but wanted to get some others views on it.
So me and my DP have been together for 2 years he has two DC from previous relationship who are 4 and 6. DP ex has always disliked me.. I was not the OW before anyone asks... she broke up with him but then in my personal opinion I think she regretted it. So anyway she is always making digs about me to DP and anyone that will listen and has made up lies... that I don’t want to say as it will give it away too much but they were about my family, really odd things that weren’t true and wouldn’t affect anyone’s life if they were just weird. When questioned on it she just said she knows everything and nothing gets by her 
So she can be pretty vile to me and to my DP occasionally when she is having a bad day it seems. However they text throughout the day ... mainly about the kids but sometimes she will text him to say she has watched something and he should watch it and things like that.
Now in the beginning this wasn’t something that bothered me as I saw it as good they are having a healthy co parenting relationship. But as time has gone on it’s annoying me more and more because she doesn’t like me and makes horrible comments about me constantly and her family do also but they all act like the best friends with DP.
I understand they will talk and speak as they have DC it’s just the amount of conversation when it’s somebody that hates me openly I’m becoming abit upset by.
My DPs not doing anything wrong and it’s not in my hands to stop even if I wanted to, just wanted an outlet I guess to see if im being bitter
or if your DP being friends with someone who slates you at any opportunity would irratate you too?
Nothing is changing regardless and I’ll have to just suck it up I’m just trying to work out if the last 2 years have made me abit bitter or have just ground me down.