<human>: My ex and I dated for years. All throughout school. We had a really bad break up, and we went NC one day, with no closure, and she just started dating some guy a few days later as if she didn't just get out of an extremely long, committed relationship, and for that reason, a part of her sticks to me, to this day. 

Sometimes, when I'm alone, I go onto her blog, and I get really close to leaving awful, cruel messages to her, but back down. One of these days I feel like I'm just going to do it. 

How do I get over someone I didn't really have any closure with? How do I continue to resist the temptation to say something really cruel to her if my emotions about her aren't really showing signs of subsiding?

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: I want to get over my ex who I had no closure with, and I want to resist the temptation of leaving her really cruel messages, or doing something to harm her (non-physically, of course).