What to do about partners boundaries?

Been in a relationship enough to notice a pattern with the partner when it concerns his boundaries. They are not like mine. In the past he would not react as early as I would when lets say someone in his first family was behaving badly. Other situations too I noticed I am always the one reacting first, before him, to a boundary being crossed. The way I react I notice that the one having crossed a boundary gets the message and stop what ever he/she thinks they are doing and it doesn't get bigger than that. But with him he waits too long or he claims he didn't see it as that. As a result this green light he sends out then makes who ever is doing it think they can continue or increase their act. So drama is then invited into not just his life, but mine too and now I'm reacting to it. Suddenly it hits home with him, with or without me present or knowing about it, and he has this strong reaction to it, so now there is much drama, a scene that in my opinion never happens if I was in his shoes, as I react sooner and by that early it doesn't take much to get that someone who's crossed it to stop. Not only does the one who has been crossing boundaries look confused (as this was going so well before) but everyone else by this point also feel confused as he is by then so mixed up with the one he's now mad at, and take distance from to try to save his own innocense.

I have been told in a relationship I have every right to voice, claim my boundaries, my deal breakers and they should be respected by my partner, but in reality this doesn't work as his boundaries, or looking at things are so different from mine when it concern himself. I can't really tell him my boundaries should be your boundaries when it's stuff that concern him first of all, but at the same time I can't function, feel a we team, if I'm with someone with less so.

What to do about partners boundaries?
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