Scorpio ex hurt me and pretends like nothing happened?

I've been in a relationship with my ex scorpio for 5 years. We briefly broke up last year and both moved on to new relationships. We started speaking again, broke off our relationships and got back together. 3 weeks ago he cheated on me with his previous girlfriend and just disappeared. I wrote him an email asking him for all of my things. We met up, I got my things and just walked away without saying goodbye. So I was sitting on the train on my way home and to my surprise he was standing in front of me just watching me like some creep. I avoided eye contact and got off on my stop. The next day he randomly writes me an email asking if I fixed my iphone. The nerve! We never discussed how he betrayed me and he never apologized. Why does he think its ok to have casual conversation with me as if nothing happened? I honestly miss him and love him but I'll never be able to trust him again. At this point, I'm ignoring him although its hard. I just would like some insight on how hemay be feeling or what he's thinking.

I'm a cancer.

It really doesn't matter what horoscope sign you are. That is just another thing that tries to get you into believing things like the bible and stuff. Anyways, just leave the guy alone. Don't talk to him don't reply to his email. NOTHING! Ignore him completely!