There's probably no "real you" that exists across time. That's just a thing you built up when you were younger to give yourself a stable identity and core values.

The you now is just as real as the you then. We all adapt to our surroundings and change to make our lives easier. There's absolutely nothing wrong with that.

If you're unhappy with your life now, you can adapt by changing. You need to believe that, and you probably know it since it seems to be something you're afraid of. But this is the real you now, and you need to focus on the needs of that person, not some idealized phantom from the past.