I completely see your mom's point of view. From what you have shared on here, and IRL, your mom prolly sees a lot more of it, I have wondered the same things she must be articulating. Not everyone wants/needs to be married. And, that, to me, is what separates your situation from Taz's. I get the real sense you have always wanted more than Mike, faster that Mike, and that YOU want more in terms of commitment.

I know your mom wants only what is best for you. She has no one else's interest at heart. And, if Mike is making comments against/about your parent(s), that, to me, is a big sign of disrespect.