Wh do you think?

I just had a random question that none of you can truly answer but can give opinions on. My boyfriend once said that I was different and when I asked how and why he never really told me. And thinking about other things he’s broken up with girls for things that I do but hasn’t broken up with me. I just wonder why? Why he hasn’t broken up with me if he’s broken up with other ppl for the same things and what makes me different. Thoughts?