You share a lot of wisdom at a very young age. Kudos to you for recognizing that you were in an unhappy place and for walking away from it. Every relationship takes a lot of effort to maintain and grow and it has to come from both individuals to make it work.

You are correct, you should always value your self worth, but don't let this experience scar you for how much you will give yourself in the next one. Each experience is different and the lessons you learn along the way will be your guiding light.