No proof or closure

I've been in a very loving and committed relationship for almost three years now. Recently I've been having dreams about my first love almost every night, now they are not sexual what so ever, however the dreams give me a feeling of somethings missing. The relationship ended with him going away to school in Florida for a year, changing his number and then saying we need to see other people.

We had broken up briefly in my junior year of high school, six days after prom. I just have a feeling in my gut that he cheated on me and maybe that's what I can't get over, but when I confronted him at the end of the relationship asking him if he had any secrets that he had kept from me but he didn't give me a sure answer, all he said was that he didn't want to end things badly and wanted to remain close friends. I tried the friend thing for a year but I slowly started to delete him off of everything because clearly being friends was just hurting me. I haven't spoken to him in 2 years and haven't seen in in over 3. I had already started my current relationship by then. Don't get me wrong I love my boyfriend now to no ends, I want to marry him someday and are even planning on having a baby in the next year, but am I wrong to feel like this? I'm always afraid to talk to close friends about this. Please tell me I'm not alone feeling like this. I just want the dreams to go away.