As the title suggest, I've realized that I'm taking my past out on my partner and I'm not sure how to stop.  

In February I finally ended a 4 year long abusive relationship.  In the time we were together, I was emotionally abused, cheated on, hurt in too many ways.  Because of this, I have a lot of issues and trauma related to relationships and I feel like I'm indirectly taking it out on my partner.  I never say anything to him directly, I never accuse him of anything.  But I'm always thinking these things and it's hurting me really bad.

In my past relationship, she would disappear for hours and days at a time, and while gone she would cheat on me.  I later found out that at one point she was in a whole other relationship while with me.  So now, if my s/o and I aren't talking constantly, I think he's cheating despite having no reason to think so. 

In my past relationship, she would insist that if I needed reassurance, just ask.  Eventually I did ask, and she yelled at me and told me it wasn't her job to reassure me.  Now when I need reassurance, I'm too scared to approach my boyfriend out of fear that he'll get angry and yell at me, despite having never yelled at me before. 

There's many other things but those are the main two I'm really struggling with.  I feel so guilty because he's been nothing but amazing to me and I'm terrified that I'm going to scare him away or he's just going to get fed up with having to deal with the aftermath of my abusive relationship.