Classy,
Whether you realise it or not, it’s a good thing your fiancé has broken up with you. Doing so by text is low, but that should affirm why this person is not good for you. I went through something similar. I can tell you are an empath, with low self esteem. You are a people pleaser and thus allow others to treat you badly. Your past may have contributed to this, and somewhere you have learned to believe you aren’t worthy of real love.
I believe you were with a narcissist, and I expect they love bombed you and made you feel very special in the beginning. Gradually, you were manipulated and left to feel it was your fault this didn’t work out. But it was your lack of self esteem that brought this person into your life. They probably never loved you. And that’s hard to take.
Where do you go from here? Learn about narcissistic abuse and boundaries, because you allowed this person to walk right through you. You are a gentle soul and we need more like you, but you will have to learn to stand up for yourself in order to avoid something similar happening again.
I recommend you check out Richard Grannon on YouTube. You probably have a lot to learn, and it takes time.
Best of luck to you.