How do I try to control my nightmares about my ex?

I broke up with my ex almost 6 months ago but we were together for a lot of years. At first, I didn't dream about him (but I admit to thinking of him almost each day) but over the last few weeks it seems like I dream about him most nights and in more and more detail. The theme is we are getting back together but the people around us don't know that yet and I have to hide it. I wish I could stop this dreaming since I wake up feeling down. I am involved with someone new that I really like and he gives me happiness so I don't think it's loneliness. My ex did text me last month and a few times before that but for the most part, I ignored the texts and that seemed to aggravate him. According to his texts, he is involved with someone new and very happy (not sure I buy into all of that though). My ex in his last communications to me sort of

My ex in his last communications to me sort of "blames me" for not responding to him and not wanting to see him (I blocked him after that b/c I couldn't take the guilt). It's hard not to think about him (with his new squeeze) since we were together for so many years but I know I probably did the right thing breaking up and blocking him (even though he tried several times to see me). I am now dreaming about being in the holocaust and having to leave my home, etc. It can really be traumatic. I can only hope with time, this too shall pass. I am enjoying my new relationship but thoughts of him creep in sometimes and I try to remember the reasons I broke up with hi

All normal reactions for grief. Give yourself enough time to feel good again, enough to encourage a person you will feel very comfortable with. We think we can never replace what we have lost but being ready and open means we can easily find another person. Keep liking yourself too.