<human>: I dated my ex for 2.5 years, so we ended up being a big part of each others lives so far. But towards the end he started treating me badly and the last 1.5 years of the relationship I lost weight and had a few health problems from all the stress. I finally left the relationship after he had cheated on me with three other women while we were doing long distance at the start of this summer.

He didn't take breaking up too well and was e-mailing me and texting me weekly for about 2 months until I threatened to call the cops and tell him mom he was harassing me. Luckily his parents loved me and know that he cheated on me, so they would be on my side.  

Now that school will start in August and we will be back on campus I'm a little scared of him harassing me especially since he knows where I live, and he only lives 2 blocks away. I'm not sure if this is something I should bring up to my new bf who I have only started dating a month back, but I knew him for a longer time... Or if I should only worry him with this if it actually becomes a problem, since my new bf doesn't go to the same university I don't have to worry about him being directly involved with getting bothered by my ex.

Is this worth mentioning, or just let it go and seeing how things pan out?

Can you give me the gist of the text in a nutshell?
<bot>: Not sure If I should mention an aggressive ex to a new bf, or wait until something happens to tell him.