Perhaps she is dreaming of you?
If you want to stop this pattern in your dream tell her to leave you alone.

Found this explanation online but take it with a grain of salt as in it may or may not be for you?
To see an old ex-boyfriend from childhood in your dream refers to a freer, less encumbered relationship.

… If you dream that you want your ex-boyfriend back, then the dream may reflect waking feelings of actually wanting him back.

Alternatively, it means that you miss being in a relationship and to feel wanted.

Dream Moods Dream Dictionary: Meanings For Symbols That…
www.dreammoods.com › dreamdictionary

Are the dreams actually about her or is she just in them? Your brain never makes up the faces in your dreams, they are people you have met before.
Here is an interesting read

Just, she gets lots of free rent in my dreams, starring roles. Ha.

Short answer is no.

Are you dating someone new? When you get in a good relationship with someone else the new person will likely replace your ex in your dreams.

Been a couple in between her time, but none currently.

Are there a lot of unresolved issues between the two of you? I would often dream of my ex. Not because I wanted to be with them. But we would have these conversations in my dreams that kind of helped me work out some lingering issues. People might say that dreaming about your ex is a sign that you’re still hanging on. But for me, it was actually how I let go.

You are just in a funk with your imagination. You are dreaming lazy. Her face is easy for you.
So, it just means you need to spice up your fantasies. It really isn’t something to be suspicious of.

I’m a firm believer, that once you love someone/something, you never stop. A piece of your heart, will always be occupied by the former love interest.

To love, is what makes life worth living. How can you forget about something that made your life worth while? Well. You can’t, and shouldn’t.
You just try to remember the good times. And what made those special? Seek those qualities, in another…

Life, is love, and heartbreak… That’s just the way it is.

We are defined by our memories. Some good. Some bad. To forget, is to lose a part of yourself.
The OP, undoubtedly learned things that will make him a better man, for the next girl. Maybe, some things that he should avoid, with any future girls.
Dreaming, is somehow part of being an animal. It gives us two lives, in a way… Imagine, having no dreams…
You’d be practicality dead, for a third of your life…
I am a lucid dreamer…
I can control most dreams. But, not all…
Dreaming, is a thing that can tell us about ourselves…

Dreams, should be part of introspective thought. An important part of being a better person. “Just get another girl. ”
To an extent, this is true.
But. To forget your past, is to forget who we are…
To forget, who made us, who we are. And who we want to be…

My advice is to accept your dreams. Analysis of the dreams, will make you a better person.

Dreams, keep our loved ones lost, alive.
Dreams keep us focused on what we want, from life.

What are you afraid of? What are your goals?

If you don’t know, your dreams will tell you…

Chase the good things. If you don’t chase your dreams, they just get further away...

Dream away… Just remember your real life… There’s a correspondence…..

Peace n love.

It happens. If you really, REALLY cared for her, you may have dreams about her for a long, long time.

They say one doesn’t get over their past love until they meet their next one.

Unfortunately, love isn’t the same thing to many people. I met a guy once who was divorced. When he broke up with his new love, he confessed to me that he hadn’t loved his first wife as much as he loved this girl. And he had raised a family with this first one!

I was madly in love with a girl once. We went our separate ways about 40 years ago. I was too good for her, and I know that now. But every so often she pops into my dreams…

Just accept it, and they may go away. Or allow the dreams to remind you of that once special someone that, deep down inside, you still miss.