<human>: I broke up with my boyfriend over Christmas after finding out that he'd been lying about seeing his ex and cheating on me with her for most of our relationship. I have learnt so much from lurking on r/Relationships recently (thank you!) and went completely No Contact at the beginning of January.

I was completely in shock and very sad at first, but in hindsight, not very angry (I just wanted to pretend it hadn't happened and go back to normal). I did a lot of moping around in January and thought I would gradually start feeling better one day at a time. However I've realised that instead of feeling better I'm just feeling more and more angry at him every day. I don't know where this is coming from because I'm sticking to the No Contact and I'm doing my absolute best to distract myself with work, making plans with friends, watching lots of TV etc. But whenever I have any time to think to myself (in the shower, walking to work, on the bus) I just start doing angry monologuing in my head. If I bump into him around town I have a massive angry speech all planned out...

I know this is really unhealthy and I don't want to feel like this anymore. How do I shut down these thoughts? I wonder if I need to get off the internet because reading other people's infidelity stories seems to get me all riled up again - does anyone else have that problem here?!

Thanks.

Summarize the given text in a few sentences.
<bot>: Broke up with my lying, cheating boyfriend at the beginning of January. Feeling increasingly more angry at him rather than feeling better.