Not going out of your way to tell things that weren't asked isn't a lie..... well, sorta. Some things are, some things aren't, and from person to person, as well as with different relationships, there are some areas that it's less clear cut. When, like in my case, it's a very new thing and you aren't even sure where it's going yet I think there is more wiggle room.... but if it's been a part of you for a long time it's another. The biggest thing is that you need to try to share your feelings as EARLY AS POSSIBLE or it will be even more difficult later.
Of course I shouldn't really say that as I've not shared anything YET with my wife..... but I am trying to find ways to work into it with our conversations.