<human>: Can you provide a brief overview of the text?

There's not much more to that. She studied abroad in Europe for 6 months, and when she came back I had a feeling she wasn't being honest with me, so I went through her phone and found a lot of unexpected conversations with other men. I tried to forgive her, but after around a month, and as more details came out, I came to the conclusion that I needed to take whatever self respect I had and move on. I've been improving on my life slowly (working out, buying things I want, working harder) ever since, but I hate waking up every morning and feeling like I'm starting over. 

I know this is cliche, but in the beginning I found that drinking (and drugs) really helped me get through the day (which is crazy because I pretty much never drank and have never even touched pot before this), but I mean is that my only option? I hate these random bouts of anger I get. So I guess my question is:
<bot>: Girlfriend cheated, we broke up. What the fuck can I do that's not harmful to make these random bouts of anger go away?