It's weird, isn't it, how we can be assertive in some situations and not in others?
I am not sure if you feel this way too, but I find it difficult to realize that I've been like this for so long. I also feel like I have no idea where the line should be drawn. Maybe it's okay to err a bit on the side of sticking up for ourselves for a while
I hope you have good luck figuring this stuff out.