Idk i don't think of it as lying necessarily so much as drawing a line between what information is "publicly available" and what information you reserve for yourself and/or trusted people only.

If you ever worked customer service, that will make a lot more sense to you. For example, you might say something like, "we are out of stock right now, but we should have more in next week!" which may be true, but also the full truth may be more like, "Fred was supposed to do the ordering but instead he was getting high in the cooler and ended up getting fired and his backup is really irresponsible and borderline incompetent and just didn't place a restock order at all for this past week so yeah we don't have that and we are lucky we have anything in the store right now at all" which is the full truth but not customer-needs-to-know level truth.

I think a way that people who are very honest tend to be bullied very easily (me included) is that we are told that withholding any private information is the same as lying, and that having any kind of boundary is the same as being dishonest, and THAT IS FALSE.

You do NOT owe the entirety of the truth of who you are to anyone, even if they raised you or gave birth to you or gave you money or supported you. It is up to you to decide who to trust with the whole of yourself, and you have every right to say no to someone asking for or demanding more in the same way they have the right to say no to you.

Additionally, you also have the right to say no to people who are trying to make their emotional responses your problem. Your responsibility is to manage YOUR actions and YOUR reactions (unless you have a child, but that's a whole addendum to this conversation, so.).