Do these dreams about a certain person mean something?

Let me start by giving a little background information about myself. I am 29 years old, married, and mother of 2. My husband and I have been at odds with each other over different issues for most of the 7 years we've been together, but I've only recently considered myself unhappy with my marriage.
About 4 years ago I had a very vivid "dream" that consisted of a very clear voice telling me that I am going to marry this guy (we'll call him John Smith ) that was a casual friend from high school. In the dream I told the voice that that couldn't happen because we are both married already. The voice told me, you are now, but you won't be. Then I got a little flash of the happiness I would have with this person, but other than that the dream was completely black and only had this voice. I woke up feeling sad that my marriage was eventually going to end.
At the time I hadn't thought of John in years and had no idea if he was married or anything about him. He was someone that I always found attractive, but we were never really close. We had one evening when we were teenagers where we were both hanging out with a group of friends. We were both dating people at the time but spent the evening having meaningful conversation and then holding hands. After that, though, we never really hung out again and I never thought much about it. In fact, I had all but forgotten about that night until I had that dream. Looking back, though I realize there was a lot of chemistry between us when we held hands, and I have very vivid memories of every interaction I ever had with him, but again, at the time I never regarded it as significant.
Anyway, that first dream was 4 years ago and even after I had it, it wasn't until he found me online last year that I thought about it. However, in the past year I've been having dreams about he and I with increasing frequency. It turns out he is, in fact, married and actually married the same year I did and has children the same ages as mine. It isn't really that I have dreams that are all about him, it's just that he pops up in my dreams about other things and we are always together and incredibly happy.
I have never told anyone that I have had these dreams about John because Ithought it would make me seem weird, since it wasn't as if he was ever a significant part of my life. That is why it was even more strange when my mom came to me a couple of days ago and said "I had the weirdest dream the other night. I dreamed you came and told me that you had met a man and were really happy and you were getting married and it was John Smith from high school"
I find all this really strange and am somewhat skeptical when it comes to things like this, but I can't deny that it is starting to irk me and I feel like it all as to have some kind of meaning. What it is, I don't know. I am still married, and though I'm not currently happy, I am committed to my husband and working things out and by all accounts John seems to be very happy with his wife. I also don't know if I believe that dreams can be prophetic, or if I'm even capable of having them if they can be, and why of all things to be revealed it'd be this (if that were the case). I'm just hoping to get some insight from others about this as I don't want to tell anyone close to me.

I think that if you've been contemplating these things, maybe your Mom picked up on it subconsciously and that's how it popped up in her dream. Just a thought.

I think it very well could be signs, but it ultimately depends on whether you want to act on them or not. My advice? Don't do anything unless you're sure it's in your absolute best interest and won't harm those around you, moreover your children. It could be emotionally devastating for them to lose their mom at an early age.

Contemplate every angle, look at all the signs and make the choice. Do you take the leap of faith or not? That's an answer only you may know.

I think that if you're already unhappy in your relationship, you should think about leaving. Even if you have no intentions of seeking out this other man, if you're unhappy already, your kids are probably aware of that. They can feel it. I knew when my parents were not happy with each other.