After dating a couple of boys in my teens briefly I spent almost the entirety of my 20's single due to being hurt in a relationship.
3 years ago next month I tidied up my FB and got rid of a load of people including my first ever bf from when I was 16. (We dated for a month and a half, were inseparable but it was too much for my 16 year old self to handle)
He called me out on deleting him, we texted solidly for a week, then came the epic 3 hour phone calls ;) we met up 3 weeks after that and spent 6 months long distance dating before I moved halfway across the country.
3 years on we are married and due our first baby this Christmas. I still grin insanely when I think of him, we still text daily even though we live together and I am ludicrously happy.
If you had told me 3 years ago, that I would be married to my first boyfriend from 15 years before, pregnant and this smiley I would have laughed. I went from an utter cynic, permanently single to the soppiest, happiest girl in the world.
Fingers crossed for you OP, it can happen!