How much time have you spent being single?
If you’re currently single: is it by choice or circumstance?
Do you / did you enjoy single life?
What are / were the pros and cons?
Is / was partnership a goal of yours?
If you’re currently not single: Did your goals change after getting into a relationship?
What are the pros and cons?
Sounds like you don’t have the same boundaries or really want the same things. That’s a compatibility issue. Yeah, pushing her boundaries was probably wrong. The right thing to do would’ve been acknowledging you want something different and breaking it off.
And it does get easier with time. Maybe not every day but month by month it gets easier.