Dreams aren't always foretelling of the future. Sometimes they are our mind's way of processing fears/anxieties / and emotions. I always dream my b-friend does something super heinous and I'll stay mad at him all morning even though it was just a dream because it feels so real. I have had some dreams come true like a deja vu sort of thing. Other dreams are just dreams. Is there anything else that makes you believe your b-friend is going to cheat on you? Is there something your subconscious is picking up
on or are you just feeling insecure or unloved? May angels surround you.