Does setting boundaries push the dismissive avoidant further away? I would say that it depends on the boundary. If it's something like them popping up at your house unexpectedly, they'll understand that, because they value that boundary themselves. However, if it's something like you're texting them and you ask them to respond to you within a certain time frame, then that might be something that makes them pull back. Here's the important thing, being in a healthy relationship you have to feel that you have the space to have these tough conversations. You should never have the feeling that ‘if I set this boundary I'll be abandoned’ or the feeling that ‘I should ignore this boundary and abandon myself’. A healthy partner will allow for you to have that voice. A selfish partner will get triggered, frustrated that not everything is going their way.
Does setting boundaries push the Dismissive Avoidant further away?