weird dreams

so I keep having weird dreams and they involve my boyfriend cheating on me. they're not the same dream every time. just whenever I dream about him, he's always cheating on me. 
I don't know if it's because I'm still paranoid as hell or something. 
we've been together just over 2 months and he promised me he'd never cheat and even on his phone there isn't anything on there with other girls. I trust him but these dreams keep getting to me for some reason. 
has this ever happened to anyone? is there any way I could possibly stop this?