Have you ever started dating someone casually, only to have it turn into something serious? How did it happen?

Dating feels so complicated these days. Between my own experiences and the stories I hear from friends, it’s hard not to feel discouraged or start losing hope of finding the right person. I’m curious, can a casual connection ever grow into something meaningful? If this has happened to you, I’d love to hear your story. Maybe it’ll give me (and others) a little hope.