Cant cum without jealous thoughts

I used to be "normal" and cum watching porn or imagining little scenarios, but in college I caught my boyfriend who I loved in his porn addiction. I felt so hurt that he needed to look at other chicks to cum. Well since then whenever I date someone and I care about them, I have to picture them wanting someone else in order to cum. I can still cum watching some porn, but if I want to cum thinking of my partner, or with them, I have go to that jealous place. I've read other posts similar so I know I'm not alone, but my question is, can I somehow reverse this? Is there any hope for me cumming with him normal? Any suggestions would be great. I just don't want to cum and feel depressed right after...