<human>: So my exgirlfriend dated for a year and a half and we broke up because of me going on a trip with some people she didn't like over summer. She was back home for summer vacation 500 miles away from me as we go back to our towns for summer break from college. She started dating her coworker from home  who was always on her from the beginning 4 days after we broke up and since then has been sending snapchats of her and this guy including him shirtless on a bed. 

I know she's doing this to cause some reaction from me or just to "win the breakup" as she has always tried to get back at me even when we were dating. While she kept sending these pictures I would also put pictures of a girl she didn't like doing normal activities like eating breakfast at a restaurant or something but never any explicit shit like she has done. Now that she's back she even comes to my work to get a drink I work at a coffee shop all the time and it makes it awkward for me since I don't want her there and I told her. I don't have a good image of her since I thought we were just gonna be in a fight and not actually move on to new significant others. 

The point of this is he came to visit and I just got a new pic of him on snapchat sent directly of him in a bed shirtless saying he came to visit. I found a picture of her being on some other guy from her roommate that they posted on snapchat while they were drunk that resembles him. I could tweet at him saying "I thought you came to visit  last week " and attach the picture or I can send it to her with the same caption. Or if she brings him to my work to try to make me jealous like she would do I can say this face to face and pull out the picture on my phone. 
What do I do Reddit? Should I just keep ignoring her to show it doesn't hurt me or throw a wrench in this relationship?

Give me the gist of the text in a nutshell
<bot>: we broke up.she dated new guy 4 days later. She brags about him to me via snap and text. I can show him a picture of her grinding on some guy.